2014 Mustang Workshop Manual

SECTION 417-02: Interior Lighting	2014 Mustang Workshop Manual
DIAGNOSIS AND TESTING	Procedure revision date: 01/07/2013

Interior Lighting

Special Tool(s)
	Fluke 77-IV Digital Multimeter FLU77-4 or equivalent
	Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
	Flex Probe Kit NUD105-R025D or equivalent

Principles of Operation

The Smart Junction Box (SJB) supplies voltage to the interior lighting system. The interior lighting system illuminates the courtesy lamp to enhance visibility of the interior. When a vehicle door is ajar and the vehicle speed is less than 15 km/h (9 mph), or the instrument panel dimmer switch is in the DOME LAMP position, the SJB provides voltage to the courtesy lamp circuit. The SJB controls all interior lighting functions and timing by monitoring inputs from the door ajar switches, the instrument panel dimmer switch, and vehicle speed.

The instrument panel dimmer switch receives a voltage signal from the SJB . The instrument panel dimmer switch provides variable resistance for backlighting the Instrument Panel Cluster (IPC) and a toggle on/off function for the courtesy lamp.

The Remote Keyless Entry (RKE) receiver is contained inside the SJB . When the SJB receives an unlock request from a RKE transmitter, it unlocks the doors and turns on the courtesy lamp.

Interior Lamp Arbitrator

The SJB chooses between the interior lighting, dome defeat, interior lighting delay, illuminated entry, illuminated exit and battery saver to determine which feature has precedence of activating and deactivating the interior lamps.

Ambient Lighting

The Body Control Module B (BCM-B) monitors the door courtesy lighting, courtesy lighting delay and illuminated exit requests. When a door is opened, the BCM-B turns on all 3 zones of the ambient lighting system. Zone 3 (door scuff plate LEDs) are turned off when any door is closed, or the illuminated entry request is detected by the BCM-B . The other 2 zones are turned off at the same time as the courtesy lighting by the BCM-B if the key is not activated in the ignition switch. The ambient lighting is reactivated when the ignition is placed in the accessory ON or RUN position.

The color of the LEDs always defaults to the last setting in the memory. There are 125 different color combinations that are achieved by adjusting the 3 primary (red, green and blue) colors.

Field-Effect Transistor (FET) Protection

Field-Effect Transistor (FET) is a type of transistor that when used with module software can be used to monitor and control current flow on module outputs. The FET protection strategy is used to prevent module damage in the event of excessive current flow.

The SJB utilizes an FET protective circuit strategy for many of its outputs (for example, a headlamp output circuit). Output loads (current level) are monitored for excessive current (typically short circuits) and are shut down (turns off the voltage or ground provided by the module) when a fault event is detected. A continuous DTC is stored at the fault event and a cumulative counter is started.

When the demand for the output is no longer present, the module resets the FET circuit protection to allow the circuit to function. The next time the driver requests a circuit to activate that has been shut down by a previous short ( FET protection) and the circuit remains shorted, the FET protection shuts off the circuit again and the cumulative counter advances.

When the excessive circuit load occurs often enough, the module shuts down the output until a repair procedure is carried out. Each FET protected circuit has 3 predefined levels of short circuit tolerance based on the harmful effect of each circuit fault on the FET and the ability of the FET to withstand it. A module lifetime level of fault events is established based upon the durability of the FET . If the total tolerance level is determined to be 600 fault events, the 3 predefined levels would be 200, 400 and 600 fault events.

When each tolerance level is reached, the continuous DTC that was stored on the first failure cannot be cleared by a command to clear the continuous DTCs. The module does not allow this code to be cleared or the circuit restored to normal operation until a successful self-test proves that the fault has been repaired. After the self-test has successfully completed (no on-demand DTCs present), DTC B106E and the associated continuous DTC (the DTC related to the shorted circuit) automatically clears and the circuit function returns.

When the first or second level is reached, the continuous DTC (associated with the short circuit) sets along with DTC B106E. These DTCs can be cleared using the module on-demand self-test, then the Clear DTC operation on the scan tool (if the on-demand test shows the fault corrected). The module never resets the fault event counter to zero and continues to advance the fault event counter as short circuit fault events occur.

If the number of short circuit fault events reach the third level, then DTCs B106F and B1342 set along with the associated continuous DTC. This DTC cannot be cleared and the module must be replaced.

The BCM-B utilizes a similar strategy.

The SJB FET protected output circuits for the interior lighting system is the courtesy lamp output circuit.

The BCM-B FET protected output circuits for the interior lighting system are the ambient lighting output circuits.

Inspection and Verification

Verify the customer concern.

Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart

Mechanical	Electrical
Luggage compartment lid ajar switch (part of the luggage compartment lid latch)	Smart Junction Box (SJB) fuse(s): 9 (15A) (courtesy lamp) 25 (10A) (demand lamp) Wiring, terminals or connectors Bulbs Instrument panel dimmer switch Dome/map lamp Vanity mirror lamp Luggage compartment lamp SJB

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

NOTE: Make sure to use the latest scan tool release software.
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).

NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM .
If the scan tool does not communicate with the VCM :
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM .
- Refer to Section 418-00 , No Power To The Scan Tool, to diagnose no power to the scan tool.

If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
- Refer to Section 418-00 to diagnose no response from the PCM.

Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to Section 418-00 .
- If the network test passes, retrieve and record the continuous memory DTCs.

Clear the continuous DTCs and carry out the self-test diagnostics for the SJB and the Body Control Module B (BCM-B).

If the DTCs retrieved are related to the concern, go to DTC Charts. For all other DTCs, refer to the Diagnostic Trouble Code (DTC) Chart in Section 419-10 .

If no DTCs related to the concern are retrieved, GO to Symptom Chart .

DTC Charts

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Smart Junction Box (SJB) DTC Chart

DTC	Description	Action
B106E	Solid State Driver Disabled Due to Short Circuit	The module has temporarily disabled an output because an excessive current draw exists (such as a short to ground). The Smart Junction Box (SJB) cannot enable the output until the cause of the short is corrected. ADDRESS all other DTCs first. After the cause of the concern is corrected, CLEAR the DTCs. REPEAT the self-test.
B106F	Module Disabled Due to External Fault	The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the SJB can withstand. The cause of the excessive current draw MUST be corrected before a new SJB is installed. ADDRESS all other DTCs first. After the cause of the concern is corrected, INSTALL a new SJB . REFER to Section 419-10 . TEST the system for normal operation.
B1320	Driver Door Ajar Circuit Open	GO to Pinpoint Test D .
B1328	Passenger Door Ajar Circuit Open	GO to Pinpoint Test D .
B1331	Decklid Ajar Rear Door Circuit Failure	GO to Pinpoint Test F .
B1688	Lamp Dome Input Circuit Short to Ground	GO to Pinpoint Test D .
B2A35	Interior Lighting Output Circuit Open	If the interior courtesy lamp is inoperative, GO to Pinpoint Test C . If the interior courtesy lamp stays on continuously, GO to Pinpoint Test D .
B2A36	Interior Lighting Output Circuit Short to Ground	GO to Pinpoint Test C .
B2A38	Floor Lamp Circuit Short to Ground	DIAGNOSE all other DTCs and symptoms first. If no other DTCs or symptoms are present, INSPECT the SJB and C2280a for bent pins, loose or corroded connections. If no concerns are found, INSTALL a new SJB . REFER to Section 419-10 . TEST the system for normal operation.
B2A39	Puddle Lamp Output Circuit Open	If the pony projection lights are inoperative, GO to Pinpoint Test J . If the pony projection lights are always on, GO to Pinpoint Test K .
B2A3A	Puddle Lamp Output Circuit Short to Ground	GO to Pinpoint Test J .
All other DTCs	—	REFER to the Diagnostic Trouble Code (DTC) Chart in Section 419-10 .

Body Control Module B (BCM-B) DTC Chart

DTC	Description	Action
B127B:11	Ambient Lighting Zone 1 Output Red LED Circuit Short To Ground	GO to Pinpoint Test H .
B127B:15	Ambient Lighting Zone 1 Output Red LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B127C:11	Ambient Lighting Zone 2 Output Red LED Circuit Short To Ground	GO to Pinpoint Test H .
B127C:15	Ambient Lighting Zone 2 Output Red LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B127D:11	Ambient Lighting Zone 3 Output Red LED Circuit Short To Ground	GO to Pinpoint Test H .
B127D:15	Ambient Lighting Zone 3 Output Red LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B127E:11	Ambient Lighting Zone 1 Output Green LED Circuit Short To Ground	GO to Pinpoint Test H .
B127E:15	Ambient Lighting Zone 1 Output Green LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B127F:11	Ambient Lighting Zone 2 Output Green LED Circuit Short To Ground	GO to Pinpoint Test H .
B127F:15	Ambient Lighting Zone 2 Output Green LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B1280:11	Ambient Lighting Zone 3 Output Green LED Circuit Short To Ground	GO to Pinpoint Test H .
B1280:15	Ambient Lighting Zone 3 Output Green LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B1281:11	Ambient Lighting Zone 1 Output Blue LED Circuit Short To Ground	GO to Pinpoint Test H .
B1281:15	Ambient Lighting Zone 1 Output Blue LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B1282:11	Ambient Lighting Zone 2 Output Blue LED Circuit Short To Ground	GO to Pinpoint Test H .
B1282:15	Ambient Lighting Zone 2 Output Blue LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
B1283:11	Ambient Lighting Zone 3 Output Blue LED Circuit Short To Ground	GO to Pinpoint Test H .
B1283:15	Ambient Lighting Zone 3 Output Blue LED Circuit Short To Battery or Open	If the ambient lighting is inoperative, GO to Pinpoint Test I . If the ambient lighting does not cycle through all colors, GO to Pinpoint Test H .
U1000:00	Solid State Drive Protection Activated-Driver Disabled: No Sub Type Information	The module has temporarily disabled an output because an excessive current draw exists (such as a short to ground). The Body Control Module B (BCM-B) cannot enable the output until the cause of the short is corrected. ADDRESS all other DTCs first. After the cause of the concern is corrected, CLEAR the DTCs. REPEAT the self-test.
U3000:49	Control Module: Internal Electronic Failure	The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the BCM-B BCM-B can withstand. The cause of the excessive current draw MUST be corrected before a new BCM-B is installed. ADDRESS all other DTCs first. After the cause of the concern is corrected, INSTALL a new BCM-B . REFER to Section 419-10 . TEST the system for normal operation.
All other DTCs	—	REFER to the Diagnostic Trouble Code (DTC) Chart in Section 419-10 .

Symptom Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Symptom Chart
Condition	Possible Sources	Action
The courtesy lamp flashes on and off	Smart Junction Box (SJB) is not configured correctly	CONFIGURE the SJB . REFER to Section 418-01 . TEST the system for normal operation.
The courtesy lamp does not turn on with a door open	Wiring, terminals or connectors Door ajar switch SJB	GO to Pinpoint Test A .
The courtesy lamp is inoperative from the instrument panel dimmer switch	Wiring, terminals or connectors Instrument panel dimmer switch SJB	GO to Pinpoint Test B .
The interior courtesy lamp is inoperative	Fuse Wiring, terminals or connectors Overhead console SJB	GO to Pinpoint Test C .
The pony projection light(s) are inoperative	Wiring, terminals or connectors Exterior mirror	GO to Pinpoint Test J .
The interior courtesy lamp stays on continuously	Wiring, terminals or connectors Door ajar switch Instrument panel dimmer switch SJB	GO to Pinpoint Test D .
The pony projection lights stay on continuously	Wiring, terminals or connectors SJB	GO to Pinpoint Test K .
One or more demand lamp is inoperative	Wiring, terminals or connectors Overhead console Sun visor (vanity mirror lamp) SJB	GO to Pinpoint Test E .
The luggage compartment lamp is inoperative/always on	Wiring, terminals or connectors Luggage compartment lamp Luggage compartment lid latch SJB	GO to Pinpoint Test F .
The battery saver does not deactivate after time-out	Wiring, terminals or connectors SJB	GO to Pinpoint Test G .
The ambient lighting does not cycle through all color combinations (single LED or zone)	Wiring, terminals or connectors Ambient lighting harness Body Control Module B (BCM-B)	GO to Pinpoint Test H .
An individual LED is inoperative	Wiring, terminals or connectors Ambient lighting harness	GO to Pinpoint Test H .
The ambient lighting is inoperative	Wiring, terminals or connectors BCM-B	GO to Pinpoint Test I .

Pinpoint Tests

Pinpoint Test A: The Courtesy Lamp Does Not Turn On With A Door Open

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Refer to Wiring Diagrams Cell 117 , Remote Keyless Entry And Alarm for schematic and connector information.

Normal Operation

The Smart Junction Box (SJB) sends a voltage signal to the door ajar switches. When the door is closed, the voltage signal is routed to ground. When the door is opened, the signal to ground is interrupted indicating an open door to the SJB .

When any door is opened, or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected, the SJB provides voltage to the courtesy lamp.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Door ajar switch
SJB

PINPOINT TEST A: THE COURTESY LAMP DOES NOT TURN ON WITH A DOOR OPEN

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step

Result / Action to Take

A1 CHECK THE COURTESY LAMP OPERATION USING THE INSTRUMENT PANEL DIMMER SWITCH

Operate the courtesy lamp using the instrument panel dimmer switch.
Does the courtesy lamp illuminate using the instrument panel dimmer switch?

Yes
GO to A2 .

No
GO to Pinpoint Test C .

A2 CHECK THE DOOR AJAR SWITCH OPERATION

Ignition OFF.
Disconnect: Suspect Door Ajar Switch.
Do the interior lamps illuminate?

Yes
INSTALL a new door latch in question. REFER to Section 501-14 . TEST the system for normal operation.

No
GO to A3 .

A3 CHECK THE AJAR SWITCH CIRCUIT FOR A SHORT TO GROUND

Disconnect: SJB C2280c.
Measure the resistance between the suspect door ajar switch, harness side and ground as follows:

Location	Connector-Pin	Circuit
LH front door	C501-5	CPL26 (GN/VT)
RH front door	C603-5	CPL31 (WH)

Is the resistance greater than 10,000 ohms?

Yes
GO to A4 .

No
REPAIR the circuit in question for a short to ground. TEST the system for normal operation.

A4 CHECK FOR CORRECT SJB OPERATION

Disconnect all the SJB connectors.
Check for:

corrosion

damaged pins

pushed-out pins

Connect all the SJB connectors and make sure they seat correctly.
Operate the system and verify the concern is still present.
Is the concern still present?

Yes
INSTALL a new . REFER to Section 419-10 . TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

Pinpoint Test B: The Courtesy Lamp Is Inoperative From The Instrument Panel Dimmer Switch

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation

The Smart Junction Box (SJB) monitors the instrument panel dimmer switch status to determine if the courtesy lamp is requested. Based on the instrument panel dimmer switch status, the SJB supplies voltage to the courtesy lamp.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Instrument panel dimmer switch
SJB

PINPOINT TEST B: THE COURTESY LAMP IS INOPERATIVE FROM THE INSTRUMENT PANEL DIMMER SWITCH

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step	Result / Action to Take
B1 CHECK THE DIMMABLE BACKLIGHTING OPERATION
Place the headlamp switch in the PARKLAMP position. Monitor the instrument panel dimmable backlighting while rotating the instrument panel dimmer switch from full on to full off. Does the dimmable backlighting intensity change with the instrument panel dimmer switch position?	Yes GO to B2 . No REFER to Section 413-00 .
B2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH
Ignition OFF. Disconnect: Instrument Panel Dimmer Switch C2298. Connect a fused jumper wire between the instrument panel dimmer switch C2298-2, circuit CLN28 (GN/BU), harness side and the instrument panel dimmer switch C2298-4, circuit RLN29 (WH/OG), harness side. Does the courtesy lamp illuminate?	Yes REMOVE the jumper wire. INSTALL a new instrument panel dimmer switch. REFER to Section 413-00 . TEST the system for normal operation. No REMOVE the jumper wire. GO to B3 .
B3 CHECK THE DOME LAMP REQUEST INPUT CIRCUIT FOR AN OPEN
Disconnect: SJB C2280b. Measure the resistance between the SJB C2280b-51, circuit CLN28 (GN/BU), harness side and the instrument panel dimmer switch C2298-2, circuit CLN28 (GN/BU), harness side. Is the resistance less than 3 ohms?	Yes GO to B4 . No REPAIR circuit CLN28 (GN/BU) for an open. TEST the system for normal operation.
B4 CHECK FOR CORRECT SJB OPERATION
Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present?	Yes INSTALL a new SJB . REFER to Section 419-10 . TEST the system for normal operation. No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

Pinpoint Test C: The Interior Courtesy Lamp Is Inoperative

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation

Voltage is supplied to the courtesy lamp by the Smart Junction Box (SJB) fuse 9 (15A). Based on the input status, the SJB supplies voltage to the courtesy lamp.

DTC Description	Fault Trigger Conditions
B106E — Solid State Driver Disabled Due to Short Circuit	A continuous DTC that sets when the SJB has temporarily shut down the output driver. The module has temporarily disabled the courtesy lamp output because an excessive current draw exists (such as a short to ground). The SJB cannot enable the courtesy lamp output until the cause of the short is corrected, the DTCs have been cleared and a successful self-test is run.
B106F — Module Disabled Due to External Fault	A continuous DTC that sets when the SJB has permanently shut down the output driver. The module has permanently disabled the courtesy lamp output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the SJB can withstand. The cause of the excessive current draw MUST be corrected before a new SJB is installed.
B2A35 — Interior Lighting Output Circuit Open	An on-demand DTC that sets when the SJB detects an open from the courtesy lighting output circuit.
B2A36 — Interior Lighting Output Circuit Short To Ground	A continuous and on-demand DTC that sets when the SJB detects a short to ground from the courtesy lighting output circuit.

This pinpoint test is intended to diagnose the following:

Fuse
Wiring, terminals or connectors
Overhead console
SJB

PINPOINT TEST C: THE INTERIOR COURTESY LAMP IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step

Result / Action to Take

C1 CHECK THE OPERATION OF THE COURTESY LAMP FROM THE DOOR AND THE INSTRUMENT PANEL DIMMER SWITCH

Ignition OFF.
Open and close a door.
Rotate the instrument panel dimmer switch to the DOME LAMP position and then to the OFF position.
Is the courtesy lamp inoperative from the door and the instrument panel dimmer switch?

Yes
VERIFY the fuse 9 (15A) is OK.

If OK, GO to C2 .

If not OK, REFER to the Wiring Diagrams Manual to identify the possible causes of the circuit short.

After the repair, if no DTCs are present, TEST the system for normal operation.

If DTC B106E is present, CLEAR the DTCs and REPEAT the self-test (required to enable the courtesy lamp output driver if DTC B106E is present) . TEST the system for normal operation.

If DTC B106F is present, INSTALL a new . REFER to Section 419-10 . TEST the system for normal operation.

No
If inoperative from the door, GO to Pinpoint Test A .

If inoperative from the instrument panel dimmer switch, GO to Pinpoint Test B .

C2 CHECK FOR VOLTAGE TO THE INTERIOR LAMP

Disconnect: Interior Lamp.
Rotate the instrument panel dimmer switch to the DOME LAMP position.
Measure the voltage between the interior lamp, harness side and ground as follows:

Location	Connector-Pin	Circuit
Front interior/map lamp (with convertible top)	C9013-4	VLN33 (GY/VT)
Front interior/map lamp (without convertible top)	C930-4	VLN33 (GY/VT)

Is the voltage greater than 11 volts?

Yes
GO to C3 .

No
GO to C4 .

C3 CHECK FOR VOLTAGE TO THE INTERIOR LAMP USING THE CONNECTOR GROUND

Measure the voltage between the interior lamp, harness side as follows:

Location	Connector-Pin/ Circuit	Connector-Pin/ Circuit
Front interior/map lamp (with convertible top)	C9013-4 VLN33 (GY/VT)	C9013-5 GD139 (BK/YE)
Front interior/map lamp (without convertible top)	C930-4 VLN33 (GY/VT)	C930-5 GD139 (BK/YE)

Is the voltage greater than 11 volts?

Yes
INSTALL a new overhead console. REFER to Section 501-12 . TEST the system for normal operation.

No
REPAIR circuit GD139 (BK/YE) for an open. TEST the system for normal operation.

C4 BYPASS THE SJB

Connect: Interior Lamp.
Disconnect: SJB C2280a.
NOTE: If the jumper wire fails, refer to the Wiring Diagrams Manual to identify the possible causes of the circuit short. After the repair, if no DTCs are present, test the system for normal operation. If DTC B106E is present, clear the DTCs and repeat the self-test (required to enable the courtesy lamp output driver if DTC B106E is present). Test the system for normal operation. If DTC B106F is present, install a new SJB . Refer to Section 419-10 . TEST the system for normal operation.
Connect a fused jumper wire between the SJB C2280a-9, circuit VLN33 (GY/VT), harness side and battery positive.

Does the courtesy lamp illuminate?

Yes
REMOVE the jumper wire. GO to C5 .

No
REMOVE the jumper wire. REPAIR circuit VLN33 (GY/VT) for an open. CLEAR the DTCs. REPEAT the self-test.

C5 CHECK FOR CORRECT SJB OPERATION

Disconnect all the SJB connectors.
Check for:

corrosion

damaged pins

pushed-out pins

Connect all the SJB connectors and make sure they seat correctly.
Operate the system and verify the concern is still present.
Is the concern still present?

Pinpoint Test D: The Interior Courtesy Lamp Stays On Continuously

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Refer to Wiring Diagrams Cell 117 , Remote Keyless Entry And Alarm for schematic and connector information.

Normal Operation

The SJB also monitors the instrument panel dimmer switch status to determine if the courtesy lamp is requested. When the instrument panel dimmer switch is rotated to the DOME LAMP position, ground is supplied to DOME LAMP request input circuit.

When the request from the instrument panel dimmer switch is detected, any door is opened, or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected, the SJB supplies voltage to the courtesy lamp.

DTC Description	Fault Trigger Conditions
B1320 — Driver Door Ajar Circuit Open	An on-demand DTC that sets when the SJB detects an open from the LH front door ajar input circuit.
B1328 — Passenger Door Ajar Circuit Open	An on-demand DTC that sets when the SJB detects an open from the RH front door ajar input circuit.
B1688 — Lamp Dome Input Circuit Short To Ground	An on-demand DTC that sets when the SJB detects a short to ground from the instrument panel dimmer switch circuit.
B2A35 — Interior Lighting Output Circuit Open	An on-demand DTC that sets when the SJB detects a short to voltage from the courtesy lamp output circuit.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Door ajar switch
Instrument panel dimmer switch
SJB

PINPOINT TEST D: THE INTERIOR COURTESY LAMP STAYS ON CONTINUOUSLY

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step

Result / Action to Take

D1 CHECK THE RECORDED DTCs FROM THE SJB SELF-TEST

Check the recorded results from the SJB self-test.
Is DTC B1320, B1328, B1688 or B2A35 present?

Yes
For DTC B1320 or DTC B1328, GO to D2 .

For DTC B1688, GO to D5 .

For DTC B2A35, GO to D7 .

No
GO to D7 .

D2 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH

Ignition OFF.
Disconnect: Suspect Door Ajar Switch.
Measure the voltage between the suspect door ajar switch, harness side and ground as follows:

Suspect Door Ajar Switch	Connector-Pin	Circuit
LH front	C501-5	CPL26 (GN/VT)
RH front	C603-5	CPL31 (WH)

Is the voltage greater than 11 volts?

Yes
GO to D3 .

No
GO to D4 .

D3 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH USING THE CONNECTOR GROUND

Measure the voltage between the suspect ajar switch, harness side as follows:

Suspect Door Ajar Switch	Connector-Pin	Circuit
LH front	C501-5 CPL26 (GN/VT)	C501-6 GD133 (BK)
RH front	C603-5 CPL31 (WH)	C603-6 GD139 (BK/YE)

Is the voltage greater than 11 volts?

Yes
INSTALL a new door latch for the ajar switch in question. REFER to Section 501-14 . CLEAR the DTCs. REPEAT the self-test.

No
REPAIR the ground circuit in question for an open. CLEAR the DTCs. REPEAT the self-test.

D4 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN

Disconnect: SJB C2280c.
Measure the resistance between the suspect door ajar switch, harness side and the SJB , harness side as follows:

Suspect Door Ajar Switch Connector-Pin	SJB Connector-Pin	Circuit
LH front C501-5	C2280c-14	CPL26 (GN/VT)
RH front C603-5	C2280c-2	CPL31 (WH)

Is the resistance less than 3 ohms?

Yes
GO to D8 .

No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

D5 CHECK THE INSTRUMENT PANEL DIMMER SWITCH

NOTE: Make sure the doors are closed for correct test results.

Disconnect: Instrument Panel Dimmer Switch C2298.
Wait 30 seconds and observe the courtesy lamp.
Does the courtesy lamp continue to illuminate?

Yes
GO to D6 .

No
INSTALL a new instrument panel dimmer switch. REFER to Section 413-00 . TEST the system for normal operation.

D6 CHECK THE INSTRUMENT PANEL DIMMER SWITCH DOME LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND

Disconnect: SJB C2280b.
Measure the resistance between the instrument panel dimmer switch C2298-2, circuit CLN28 (GN/BU), harness side and ground.

Is the resistance greater than 10,000 ohms?

Yes
GO to D8 .

No
REPAIR circuit CLN28 (GN/BU) for a short to ground. CLEAR the DTCs. REPEAT the self-test.

D7 CHECK THE SJB COURTESY LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.
Disconnect: SJB C2280a.
Ignition ON.
Observe the courtesy lamp.
Does the courtesy lamp continue to illuminate?

Yes
REPAIR circuit VLN33 (GY/VT) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.

No
GO to D8 .

D8 CHECK FOR CORRECT SJB OPERATION

Disconnect all the SJB connectors.
Check for:

corrosion

damaged pins

pushed-out pins

Connect all the SJB connectors and make sure they seat correctly.
Operate the system and verify the concern is still present.
Is the concern still present?

Pinpoint Test E: One Or More Demand Lamp Is Inoperative

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation

The Smart Junction Box (SJB) supplies voltage to the demand lamps using the battery saver relay. The overhead console map lamp shares ground with the courtesy lamp.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Overhead console
Sun visor (vanity mirror lamp)
Glove compartment lamp
SJB

PINPOINT TEST E: ONE OR MORE DEMAND LAMP IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step	Result / Action to Take
E1 CHECK THE COURTESY LAMP OPERATION
Ignition OFF. Attempt to turn the courtesy lamp on by opening a door or using the instrument panel dimmer switch. Does the courtesy lamp turn on?	Yes GO to E2 . No GO to Pinpoint Test C .
E2 CHECK THE OPERATION OF ALL THE DEMAND LAMPS
Ignition ON. Check the operation of both map lamps and, if equipped, both vanity mirror lamps. Are all the demand lamps inoperative?	Yes VERIFY the SJB fuse 25 (10A) is OK. If OK, GO to E5 . If not OK, REFER to the Wiring Diagrams Manual to identify the possible cause of the circuit short. No GO to E3 .
E3 CHECK FOR VOLTAGE TO THE DEMAND LAMP
Ignition OFF. Disconnect: Inoperative Demand Lamp. For the overhead console on vehicles without a convertible top, measure the voltage between the overhead console C930-3, circuit CLN09 (YE/GN), harness side and ground. For the overhead console on vehicles with a convertible top, measure the voltage between the overhead console C9013-3, circuit CLN09 (YE/GN), harness side and ground. For a vanity mirror lamp, measure the voltage between the LH vanity mirror C906-1, circuit CLN09 (YE/GN), harness side and ground; or between the RH vanity mirror C907-1, circuit CLN09 (YE/GN), harness side and ground. For a glove compartment lamp, measure the voltage between the glove compartment lamp C254-1, circuit CLN09 (YE/GN), harness side and ground Is the voltage greater than 11 volts?	Yes For the overhead console, INSTALL a new overhead console. REFER to Section 501-12 . TEST the system for normal operation. For a glove compartment lamp and vanity mirror, GO to E4 . No REPAIR circuit CLN09 (YE/GN) for an open. TEST the system for normal operation.
E4 CHECK THE VANITY MIRROR LAMP GROUND CIRCUIT FOR AN OPEN
For a vanity mirror lamp, measure the voltage between the LH vanity mirror C906-1, circuit CLN09 (YE/GN), harness side and the LH vanity mirror C906-2, circuit GD139 (BK/YE), harness side; or between the RH vanity mirror C907-1, circuit CLN09 (YE/GN), harness side and the RH vanity mirror C907-2, circuit GD139 (BK/YE), harness side. For a glove compartment lamp, measure the voltage between the glove compartment lamp C254-1, circuit CLN09 (YE/GN), harness side and glove compartment lamp C254-1, circuit GD114 (BK/BU), harness side. Is the voltage greater than 11 volts?	Yes INSTALL a new sun visor. TEST the system for normal operation. No REPAIR circuit GD139 (BK/YE) or GD114 (BK/BU) for an open. TEST the system for normal operation.
E5 BYPASS THE SJB
Disconnect: SJB C2280d. Connect a fused jumper wire between the SJB C2280d-21, circuit CLN09 (YE/GN), harness side and battery positive. Switch on a demand lamp, such as a map light. Does the demand lamp illuminate?	Yes REMOVE the jumper wire. GO to E7 . No If equipped with vanity mirror lamps, REMOVE the jumper wire. REPAIR circuit CLN09 (YE/GN) for an open. TEST the system for normal operation. If not equipped with vanity mirror lamps, LEAVE the jumper wire connected. GO to E6 .
E6 CHECK THE DEMAND LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
Disconnect: Overhead Console C930 (Without Convertible Top). Disconnect: Overhead Console C9013 (With Convertible Top). For the overhead console on vehicles without a convertible top, measure the voltage between the overhead console C930-3, circuit CLN09 (YE/GN), harness side and ground. For the overhead console on vehicles with a convertible top, measure the voltage between the overhead console C9013-3, circuit CLN09 (YE/GN), harness side and ground. Is the voltage greater than 11 volts?	Yes REMOVE the jumper wire. INSTALL a new overhead console. REFER to Section 501-12 . TEST the system for normal operation. No REMOVE the jumper wire. REPAIR circuit CLN09 (YE/GN) for an open. TEST the system for normal operation.
E7 CHECK FOR CORRECT SJB OPERATION
Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present?	Yes INSTALL a new SJB . REFER to Section 419-10 . TEST the system for normal operation. No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

Pinpoint Test F: The Luggage Compartment Lamp Is Inoperative/Always On

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation

Power is supplied to the luggage compartment lamp from the demand lighting circuit. Ground for the luggage compartment lamp is controlled by the luggage compartment lid latch. When the luggage compartment lid is opened, a switch inside the latch closes and completes the path to ground.

DTC B1331 (Decklid Ajar Rear Door Circuit Failure) — an on-demand DTC that sets when the Smart Junction Box (SJB) detects an open from the luggage compartment lid ajar input circuit.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Luggage compartment lamp
Luggage compartment lid latch
SJB

PINPOINT TEST F: THE LUGGAGE COMPARTMENT LAMP IS INOPERATIVE/ALWAYS ON

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Make sure the map lamps operate correctly before continuing diagnostics.

Test Step	Result / Action to Take
F1 CHECK THE LUGGAGE COMPARTMENT LATCH
Open the luggage compartment using the Integrated Keyhead Transmitter (IKT) or the luggage compartment release switch on the instrument panel. Does the luggage compartment open?	Yes GO to F2 . No REFER to Section 501-14 .
F2 CHECK THE LUGGAGE COMPARTMENT AJAR PID
Ignition ON. Enter the following diagnostic mode on the scan tool: SJB DataLogger. Monitor the SJB luggage compartment ajar switch PID (DECKLID) while opening and closing the luggage compartment. Does the luggage compartment ajar switch PID value agree with the luggage compartment positions?	Yes GO to F5 . No GO to F3 .
F3 CHECK THE LUGGAGE COMPARTMENT AJAR SWITCH
Disconnect: Luggage Compartment Lid Latch C430. Enter the following diagnostic mode on the scan tool: SJB DataLogger . Monitor the SJB luggage compartment ajar switch PID (DECKLID). Connect a jumper wire between the luggage compartment lid latch C430-1, circuit CPL58 (GY/OG), harness side, and the luggage compartment lid latch C430-4, circuit GD110 (BK/WH), harness side. Does the luggage compartment ajar switch PID indicate ajar with the jumper wire removed and closed with the jumper wire connected?	Yes REMOVE the jumper wire. INSTALL a new luggage compartment lid latch. REFER to Section 501-14 . TEST the system for normal operation. No REMOVE the jumper wire. GO to F4 .
F4 CHECK CIRCUIT CPL58 (GY/OG) FOR AN OPEN AND SHORT TO GROUND
Ignition OFF. Disconnect: SJB C2280c. Measure the resistance between the luggage compartment lid latch C430-1, circuit CPL58 (GY/OG), harness side and the SJB C2280c-16, circuit CPL58 (GY/OG), harness side; and between the luggage compartment lid latch C430-1, circuit CPL58 (GY/OG), harness side and ground. Is the resistance less than 3 ohms between the luggage compartment lid latch and the SJB , and greater than 10,000 ohms between the luggage compartment lid latch and ground?	Yes GO to F8 . No REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
F5 CHECK CIRCUIT CLN09 (YE/GN) FOR AN OPEN
Disconnect: Luggage Compartment Lamp C428. Ignition ON. Measure the voltage between the luggage compartment lamp C428-1, circuit CLN09 (YE/GN), harness side and ground. Is the voltage greater than 11 volts?	Yes GO to F6 . No REPAIR the circuit. TEST the system for normal operation.
F6 CHECK THE LUGGAGE COMPARTMENT LATCH
Disconnect: Luggage Compartment Lid Latch C430. Connect: Luggage Compartment Lamp C428. Monitor the luggage compartment lamp. Connect a jumper wire between the luggage compartment lid latch C430-2, circuit CLN13 (WH/BU), harness side, and the luggage compartment lid latch C430-4, circuit GD110 (BK/WH), harness side. Is the luggage compartment lamp illuminated with the jumper wire connected and off with it disconnected?	Yes REMOVE the jumper wire. INSTALL a new luggage compartment lid latch. REFER to Section 501-14 . TEST the system for normal operation. No REMOVE the jumper wire. GO to F7 .
F7 CHECK CIRCUIT CLN13 (WH/BU) FOR AN OPEN AND SHORT TO GROUND
Ignition OFF. Disconnect: Luggage Compartment Lamp C428. Measure the resistance between the luggage compartment lid latch C430-2, circuit CLN13 (WH/BU), harness side and the luggage compartment lamp C428-2, circuit CLN13 (WH/BU), harness side; and between the luggage compartment lid latch C430-2, circuit CLN13 (WH/BU), harness side and ground. Is the resistance less than 3 ohms between the luggage compartment lid latch and the luggage compartment lamp, and greater than 10,000 ohms between the luggage compartment lid latch and ground?	Yes INSTALL a new luggage compartment lamp. TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation.
F8 CHECK FOR CORRECT SJB OPERATION
Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present?	Yes INSTALL a new SJB . REFER to Section 419-10 . TEST the system for normal operation. No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

Pinpoint Test G: The Battery Saver Does Not Deactivate After Time-Out

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation

The Smart Junction Box (SJB) controls the battery saver function. The battery saver function provides automatic shutoff of the interior lamps (courtesy and demand lamps) after 10 minutes have elapsed in order to save battery power.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
SJB

PINPOINT TEST G: THE BATTERY SAVER DOES NOT DEACTIVATE AFTER TIME-OUT

Test Step	Result / Action to Take
G1 CHECK THE SJB IGNITION SWITCH PIDs
Ignition ON. Enter the following diagnostic mode on the scan tool: SJB DataLogger. Monitor the SJB ignition switch PIDs (IGN_A_ECU, IGN_O_ECU, IGN_R_ECU and IGN_S_ECU) while rotating the ignition switch through all positions. Do the ignition switch PIDs agree with the ignition switch positions?	Yes GO to G2 . No REFER to Section 211-05 .
G2 CHECK THE DEMAND LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
Ignition OFF. Disconnect: SJB C2280a. Ignition ON. Operate the demand lamp. Does the demand lamp illuminate?	Yes REPAIR the circuit. TEST the system for normal operation. No GO to G3 .
G3 CHECK FOR CORRECT SJB OPERATION
Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present?	Yes INSTALL a new SJB . REFER to Section 419-10 . TEST the system for normal operation. No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

Pinpoint Test H: The Ambient Lighting Does Not Cycle Through All Color Variations (Single LED or Zone)

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation

The Body Control Module B (BCM-B) supplies voltage and ground to the LEDs located in the floor console cup holders, console storage bin, driver and passenger scuff plates, both door map pockets and the front and rear footwells. The message center is used to cycle through the color combinations or to turn the ambient lighting feature off. There are 3 different color (red, blue and green) LEDs housed within each LED assembly.

The BCM-B has a built-in self-test that cycles through red, green and blue colors for each zone separately. Using this test may help diagnose a single color failure.

DTC Description	Fault Trigger Conditions
B127B:11 — Ambient Lighting Zone 1 Output Red LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 1 red circuit.
B127E:11 — Ambient Lighting Zone 1 Output Green LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 1 green circuit.
B1281:11 — Ambient Lighting Zone 1 Output Blue LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 1 blue circuit.
B127C:11 — Ambient Lighting Zone 2 Output Red LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 2 red circuit.
B127F:11 — Ambient Lighting Zone 2 Output Green LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 2 green circuit.
B1282:11 — Ambient Lighting Zone 2 Output Blue LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 2 blue circuit.
B127D:11 — Ambient Lighting Zone 3 Output Red LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 3 red circuit.
B1280:11 — Ambient Lighting Zone 3 Output Green LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 3 green circuit.
B1283:11 — Ambient Lighting Zone 3 Output Blue LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to ground from the ambient lighting zone 3 blue circuit.
B127B:15 — Ambient Lighting Zone 1 Output Red LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 1 red circuit.
B127E:15 — Ambient Lighting Zone 1 Output Green LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 1 green circuit.
B1281:15 — Ambient Lighting Zone 1 Output Blue LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 1 blue circuit.
B127C:15 — Ambient Lighting Zone 2 Output Red LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 2 red circuit.
B127F:15 — Ambient Lighting Zone 2 Output Green LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 2 green circuit.
B1282:11 — Ambient Lighting Zone 2 Output Blue LED: Circuit Short To Ground	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 2 blue circuit.
B127D:15 — Ambient Lighting Zone 3 Output Red LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 3 red circuit.
B127F:15 — Ambient Lighting Zone 3 Output Green LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 3 green circuit.
B1283:15 — Ambient Lighting Zone 3 Output Blue LED: Circuit Short To Battery or Open	A continuous DTC that sets when the BCM-B detects a short to battery or open from the ambient lighting zone 3 blue circuit.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Ambient lighting harness
BCM-B

PINPOINT TEST H: THE AMBIENT LIGHTING DOES NOT CYCLE THROUGH ALL COLOR VARIATIONS (SINGLE LED OR ZONE)

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step

Result / Action to Take

H1 CHECK THE BCM-B AMBIENT LIGHTING SWITCH PIDs

Ignition ON.
Place the headlamp switch in the PARKING LAMPS ON position.
Is the concern with an individual lamp?

Yes
For an individual floor console lamp, REPAIR or INSTALL a new ambient lighting harness. TEST the system for normal operation.

For all other lamps, GO to H4 .

No
If all floor console lamps are the concern, GO to H4 .

If a independent zone is the concern, GO to H2 .

H2 CHECK THE AMBIENT LIGHTING HARNESS

Ignition OFF.
Place the headlamp switch in the OFF position.
Disconnect: BCM-B C4368a.
Disconnect: BCM-B C4368b.
Check the diode circuits between the BCM-B , harness side as follows:

Connector-Pin/Circuit	Connector-Pin/Circuit
Zone 1
C4368b-11 CLN44 (OG)	C4368a-24 RLN44 (BN)
C4368b-12 CLN45 (GN)	C4368a-24 RLN44 (BN)
C4368b-13 CLN46 (BU)	C4368a-24 RLN44 (BN)
Zone 2
C4368b-24 CLN48 (YE/OG)	C4368a-24 RLN44 (BN)
C4368b-25 CLN49 (YE/GN)	C4368a-24 RLN44 (BN)
C4368b-26 CLN50 (YE/BU)	C4368a-24 RLN44 (BN)
Zone 3
C4368b-9 CLN51 (WH/OG)	C4368a-24 RLN44 (BN)
C4368b-10 CLN52 (WH/GN)	C4368a-24 RLN44 (BN)
C4368b-23 CLN53 (WH/BU)	C4368a-24 RLN44 (BN)

Does the meter indicate the circuits are good?

Yes
GO to H3 .

No
REPAIR the ambient lighting output circuit in question for an open. TEST the system for normal operation.

H3 CHECK THE AMBIENT LIGHTING OUTPUT CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between BCM-B C4368b, harness side and ground as follows:

Connector-Pin	Circuit
Zone 1
C4368b-11	CLN44 (OG)
C4368b-12	CLN45 (GN)
C4368b-13	CLN46 (BU)
Zone 2
C4368b-24	CLN48 (YE/OG)
C4368b-25	CLN49 (YE/GN)
C4368b-26	CLN50 (YE/BU)
Zone 3
C4368b-9	CLN51 (WH/OG)
C4368b-10	CLN52 (WH/GN)
C4368b-23	CLN53 (WH/BU)

Is the resistance greater than 10,000 ohms?

Yes
GO to H5 .

No
REPAIR the ambient lighting output circuit in question for a short to ground. TEST the system for normal operation.

H4 CHECK THE AMBIENT LIGHTING OUTPUT CIRCUITS FOR AN OPEN

Ignition OFF.
Place the headlamp switch in the OFF position.
Disconnect: BCM-B C4368a and C4368b.
Disconnect: Inoperative Ambient Lamp.
Measure the resistance between BCM-B , harness side and the inoperative ambient lamp as follows:

Suspect LED Component Connector-Pin	Circuit	BCM-B Connector-Pin
Zone 1
LH map pocket
C572-1 C572-2 C572-3 C572-4	CLN44 (OG) RLN44 (BN) CLN45 (GN) CLN46 (BU)	C4368b-11 C4368a-24 C4368b-12 C4368b-13
RH map pocket
C672-1 C672-2 C672-3 C672-4	CLN44 (OG) RLN44 (BN) CLN45 (GN) CLN46 (BU)	C4368b-11 C4368a-24 C4368b-12 C4368b-13
Zone 2
LH footwell lamp
C248-1 C248-2 C248-3 C248-4	CLN48 (YE/OG) RLN44 (BN) CLN49 (YE/GN) CLN50 (YE/BU)	C4368b-24 C4368a-24 C4368b-25 C4368b-26
RH footwell lamp
C238-1 C238-2 C238-3 C238-4	CLN48 (YE/OG) RLN44 (BN) CLN49 (YE/GN) CLN50 (YE/BU)	C4368b-24 C4368a-24 C4368b-25 C4368b-26
Center console
C3349-1 C3349-2 C3349-3 C3349-4	CLN48 (YE/OG) RLN44 (BN) CLN49 (YE/GN) CLN50 (YE/BU)	C4368b-24 C4368a-24 C4368b-25 C4368b-26
Zone 3
LH scuff plate
C3369-1 C3369-2 C3369-3 C3369-4	CLN53 (WH/BU) CLN52 (WH/GN) CLN51 (WH/OG) RLN44 (BN)	C4368b-23 C4368b-10 C4368b-9 C4368a-24
RH scuff plate
C3370-1 C3370-2 C3370-3 C3370-4	CLN53 (WH/BU) CLN52 (WH/GN) CLN51 (WH/OG) RLN44 (BN)	C4368b-23 C4368b-10 C4368b-9 C4368a-24

Are the resistances less than 3 ohms?

Yes
REPAIR or INSTALL a new ambient lighting harness in question. TEST the system for normal operation.

No
REPAIR the circuit in question for an open. TEST the system for normal operation.

H5 CHECK FOR CORRECT BCM-B OPERATION

Disconnect the BCM-B connector.
Check for:

corrosion

damaged pins

pushed-out pins

Connect the BCM-B connector and make sure it seats correctly.
Operate the system and verify the concern is still present.
Is the concern still present?

Pinpoint Test I: The Ambient Lighting Is Inoperative

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
BCM-B

PINPOINT TEST I: THE AMBIENT LIGHTING IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step

Result / Action to Take

I1 VERIFY THE INOPERATIVE AMBIENT LIGHTING ZONE

Verify the cupholder lid ajar switch is operating correctly by opening and closing the lid and observing the ambient lamps.
Do the ambient lamps operate correctly and follow the cupholder lid position?

Yes
GO to I2 .

No
REPAIR or REPLACE the cupholder lid ajar switch assembly. TEST the system for normal operation.

I2 CHECK THE AMBIENT LIGHTING HARNESS

Ignition OFF.
Disconnect: BCM-B C4368a and C4368b.
Check the diode circuits between the BCM-B , harness side as follows:

Connector-Pin/Circuit	Connector-Pin/Circuit
Zone 1
C4368b-11 CLN44 (OG)	C4368a-24 RLN44 (BN)
C4368b-12 CLN45 (GN)	C4368a-24 RLN44 (BN)
C4368b-13 CLN46 (BU)	C4368a-24 RLN44 (BN)
Zone 2
C4368b-24 CLN48 (YE/OG)	C4368a-24 RLN44 (BN)
C4368b-25 CLN49 (YE/GN)	C4368a-24 RLN44 (BN)
C4368b-26 CLN50 (YE/BU)	C4368a-24 RLN44 (BN)
Zone 3
C4368b-9 CLN51 (WH/OG)	C4368a-24 RLN44 (BN)
C4368b-10 CLN52 (WH/GN)	C4368a-24 RLN44 (BN)
C4368b-23 CLN53 (WH/BU)	C4368a-24 RLN44 (BN)

Does the meter indicate the circuits are good?

Yes
GO to I3 .

No
REPAIR circuit RLN44 (BN) for an open. TEST the system for normal operation.

I3 CHECK FOR CORRECT BCM-B OPERATION

Disconnect the BCM-B connector.
Check for:

corrosion

damaged pins

pushed-out pins

Connect the BCM-B connector and make sure it seats correctly.
Operate the system and verify the concern is still present.
Is the concern still present?

Pinpoint Test J: The Pony Projection Light(s) Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Power is supplied to the pony projection lights through the Smart Junction Box (SJB) fuse 10 (15A). Based on the input status, the SJB supplies voltage to the pony projection lights. The pony projection lights have separate ground circuits.

DTC Description	Fault Trigger Conditions
B106E — Solid State Driver Disabled Due to Short Circuit	A continuous DTC that sets when the SJB has temporarily shut down the output driver. The module has temporarily disabled the pony projection light output because an excessive urrent draw exists (such as a short to ground). The SJB cannot enable the pony projection light output until the cause of the short is corrected, the DTCs have been cleared and a successful self-test is run.
B106F — Module Disabled Due to External Fault	A continuous DTC that sets when the SJB has permanently shut down the output driver. The module has permanently disabled the pony projection light output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the SJB can withstand. The cause of the excessive current draw MUST be corrected before a new SJB is installed.
B2A39 — Puddle Lamp Output Circuit Open	An on-demand DTC that sets when the SJB detects an open on the pony projection light output circuit.
B2A3A — Puddle Lamp Output Circuit Short To Ground	A continuous and on-demand DTC that sets when the SJB detects a short to ground on the pony projection light output circuit. This DTC may also set as a result when the SJB fuse 10 (15A) has failed or is removed.

PINPOINT TEST J: THE PONY PROJECTION LIGHT(S) ARE INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step

Result / Action to Take

J1 CHECK THE PONY PROJECTION LIGHT OPERATION

Ignition OFF.
Operate the instrument panel dimmer switch to the DOME LAMP position.
Are both the pony projection lights inoperative?

Yes
VERIFY the fuse 10 (15A) is OK. If OK, GO to J2 .

If not OK, REFER to the Wiring Diagrams Manual to identify the possible causes of the circuit short.

After the repair: if no DTCs are present, TEST the system for normal operation.

If DTC B106E is present, CLEAR the DTCs and REPEAT the self-test (required to enable the pony projection light output driver if DTC B106E is present) . TEST the system for normal operation.

If DTC B106F is present, INSTALL a new . REFER to Section 419-10 . TEST the system for normal operation.

No
GO to J3 .

J2 BYPASS THE SJB

Operate the instrument panel dimmer switch out of the DOME LAMP position.
Disconnect: SJB C2280c.
NOTE: If the jumper wire fails, refer to the Wiring Diagrams Manual to identify the possible causes of the circuit short. After the repair: If no DTCs are present, test the system for normal operation. If DTC B106E is present, clear the DTCs and repeat the self-test (required to enable the courtesy lamp output driver if DTC B106E is present). Test the system for normal operation. If DTC B106F is present, install a new SJB . Refer to Section 419-10 . Test the system for normal operation.
Connect a fused jumper wire between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C2280c-12	CLN25 (VT)	—	Positive Battery Post

Do the pony projection lights illuminate?

Yes
REMOVE the jumper wire. GO to J3 .

No
REMOVE the jumper wire. REPAIR circuit CLN25 (VT) for an open. CLEAR the DTCs. REPEAT the self-test.

J3 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR

Operate the instrument panel dimmer switch out of the DOME LAMP position.
Disconnect: Suspect Exterior Mirror.
Operate the instrument panel dimmer switch to the DOME LAMP position.
Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LH Mirror
C516-5	CLN25 (VT)	—	Ground
RH Mirror
C622-5	CLN25 (VT)	—	Ground

Is the voltage greater than 11 volts?

Yes
GO to J4 .

No
REPAIR circuit CLN25 (VT) for an open. TEST the system for normal operation.

J4 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR USING THE CONNECTOR GROUND

Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LH Mirror
C516-5	CLN25 (VT)	C516-7	GD133 (BK)
RH Mirror
C622-5	CLN25 (VT)	C622-7	GD139 (BK/YE)

Is the voltage greater than 11 volts?

Yes
INSTALL a new exterior mirror in question. REFER to Section 501-09 . TEST the system for normal operation.

No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.

Pinpoint Test K: The Pony Projection Lights Stay On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 89 , Interior Lamps for schematic and connector information.

Normal Operation and Fault Conditions

When the request from the instrument panel dimmer switch is detected, any door is opened, a correct unlock code from the keyless entry keypad or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected, the Smart Junction Box (SJB) supplies voltage to the pony projection lights.

DTC B2A39 (Puddle Lamp Output Circuit Open) — an on-demand DTC that sets when the SJB detects a short to voltage from the pony projection light output circuit.

PINPOINT TEST K: THE PONY PROJECTION LIGHTS STAY ON CONTINUOUSLY

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step	Result / Action to Take
K1 CHECK THE INTERIOR COURTESY LAMPS
Ignition OFF. Are the interior courtesy lamps illuminated?	Yes GO to Pinpoint Test F . No GO to K2 .
K2 CHECK THE SJB PONY PROJECTION LIGHT OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
Disconnect: SJB C2280c. Ignition ON. Do the pony projection lights continue to illuminate?	Yes REPAIR circuit CLN25 (VT) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. No GO to K3 .
K3 CHECK FOR CORRECT SJB OPERATION
Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present?	Yes INSTALL a new SJB . REFER to Section 419-10 . TEST the system for normal operation. No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.