Ford Ecosport Owners and Service Manuals

Ford Ecosport: Interior Lighting / Diagnosis and Testing - Interior Lighting

Ford Ecosport 2014-2024 Service and Repair Manual / Lighting / Interior Lighting / Diagnosis and Testing - Interior Lighting


General Equipment

Ford diagnostic equipment

DTC Chart: BCM

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods for information about these practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


  BCM DTC Chart


DTC Description Action
B1175:01 Drivers Door Ajar Switch: General Electrical Failure
  • If the courtesy lamps are always on, GO to Pinpoint Test C
  • If the courtesy lamps are inoperative, GO to Pinpoint Test A
B1176:01 Passenger Door Ajar Switch: General Electrical Failure
  • If the courtesy lamps are always on, GO to Pinpoint Test C
  • If the courtesy lamps are inoperative, GO to Pinpoint Test A
B1178:01 Boot/Trunk Ajar Switch: General Electrical Failure
  • If the courtesy lamps are always on, GO to Pinpoint Test C
  • If the courtesy lamps are inoperative, GO to Pinpoint Test A
B11C0:01 Driver Side Rear Door Ajar Switch: General Electrical Failure
  • If the courtesy lamps are always on, GO to Pinpoint Test C
  • If the courtesy lamps are inoperative, GO to Pinpoint Test A
B11C1:01 Passenger Side Rear Door Ajar Switch: General Electrical Failure
  • If the courtesy lamps are always on, GO to Pinpoint Test C
  • If the courtesy lamps are inoperative, GO to Pinpoint Test A
B1306:01 Liftgate Ajar Switch: General Electrical Failure
  • If the courtesy lamps are always on, GO to Pinpoint Test C
  • If the courtesy lamps are inoperative, GO to Pinpoint Test A
B1313:11 Interior Lighting Output: Circuit Short To Ground   GO to Pinpoint Test B
B1313:15 Interior Lighting Output: Circuit Short To Battery or Open
  • If the courtesy lamps are always on, GO to Pinpoint Test C
  • If the courtesy lamps are inoperative, GO to Pinpoint Test B
B145C:11 Ambient Lighting Power Supply Output: Circuit Short To Ground   GO to Pinpoint Test F
B145C:15 Ambient Lighting Power Supply Output: Circuit Short To Battery or Open   GO to Pinpoint Test F
B1465:00 Ambient Lighting Bus 1: No Sub Type Information
  • If all the ambient lighting is inoperative or always on, GO to Pinpoint Test F
  • If one or more of the ambient lighting Light Emitting Diodes (LEDs) are inoperative or do not change intensity, GO to Pinpoint Test G
B1467:00 Ambient Lighting Bus 3: No Sub Type Information
  • If all the ambient lighting is inoperative or always on, GO to Pinpoint Test F
  • If one or more of the ambient lighting Light Emitting Diodes (LEDs) are inoperative or do not change intensity, GO to Pinpoint Test G
B14AA:11 Demand Lamp Output: Circuit Short To Ground   GO to Pinpoint Test D
B14AA:15 Demand Lamp Output: Circuit Short To Battery or Open   GO to Pinpoint Test D
B153C:11 Color Ambient Light Output:Circuit Short To Ground   GO to Pinpoint Test F
B153C:15 Color Ambient Light Output:Circuit Short To Battery or Open   GO to Pinpoint Test F
For other BCM Diagnostic Trouble Codes (DTCs) -  
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).

Symptom Chart(s)

Symptom Chart:

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Actions
A module does not respond to the scan tool  
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
The courtesy lamps do not illuminate with a door open   GO to Pinpoint Test A
One or more interior courtesy lamps are inoperative VERIFY the bulbs are OK. If OK, GO to Pinpoint Test B
All the courtesy lamps stay on continuously   GO to Pinpoint Test C
One or more demand lamps are inoperative VERIFY the bulbs are OK. If OK, GO to Pinpoint Test D
The battery saver does not deactivate after time-out   GO to Pinpoint Test E
The ambient lighting is inoperative or always on   GO to Pinpoint Test F
One or more of the ambient lighting Light Emitting Diodes (LEDs) are inoperative or do not change intensity   GO to Pinpoint Test G

Diagnostic Routine(s)


PINPOINT TEST A: THE COURTESY LAMPS DO NOT ILLUMINATE WITH A DOOR OPEN

Refer to Wiring Diagrams Cell 117 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B1175:01 Drivers Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the LH front door ajar circuit.
BCM B1176:01 Passenger Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the RH front door ajar circuit.
BCM B1178:01 Boot/Trunk Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the tailgate ajar circuit.
BCM B11C0:01 Driver Side Rear Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the LH rear door ajar circuit.
BCM B11C1:01 Passenger Side Rear Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the RH rear door ajar circuit.
BCM B1306:01 Liftgate Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the tailgate ajar circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Door latch
  • BCM

NOTE: Make sure the interior lamp switches are in the DOOR or COURTESY position before carrying out this step.

A1 CHECK THE DOOR AJAR SWITCH OPERATION
  • Disconnect Suspect Door Latch.

Do the courtesy lamps illuminate?
Yes For a front door, INSTALL a new front door latch.
REFER to: Front Door Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). For a rear door, INSTALL a new rear door latch.
REFER to: Rear Door Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). For the tailgate, INSTALL a new tailgate latch.
REFER to: Tailgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
No GO to A2

A2 CHECK THE DOOR AJAR SWITCH CIRCUIT FOR A SHORT TO GROUND

NOTE: The door ajar switches are integral to the door latches.

  • Disconnect BCM C2280F .
  • Measure:

      LH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C525-3   Ground

      RH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C609-6   Ground

      LH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C705-3   Ground

      RH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C805-6   Ground

      Tailgate Latch Assembly


    Positive Lead Measurement / Action Negative Lead
      C4223A-3   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A3
No REPAIR the circuit in question.

A3 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors and related in-line connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B: ONE OR MORE INTERIOR COURTESY LAMPS ARE INOPERATIVE

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

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B1313:11 Interior Lighting Output: Circuit Short To Ground A continuous and on-demand DTC that sets when the BCM detects an open from the courtesy lighting voltage output circuit.
BCM B1313:15 Interior Lighting Output: Circuit Short To Battery Or Open A continuous and on-demand DTC that sets when the BCM detects a short to ground from the courtesy lamp voltage supply.

Possible Sources

  • Wiring, terminals or connectors
  • Interior lamp
  • BCM
B1 CHECK THE DOOR AJAR SWITCH PARAMETER IDENTIFICATIONS (PIDS)
  • Ignition ON.
  • Using a diagnostic scan tool, enter the BCM DataLogger mode.
  • Monitor the BCM door ajar switch PIDs while opening and closing all the doors and tailgate.

Do all the door ajar switch PID values agree with the door and tailgate positions?
Yes GO to B2
No GO to Pinpoint Test A

B2 CHECK THE OPERATION OF ALL THE INTERIOR COURTESY LAMPS

NOTE: Make sure the interior lamp switches are in the DOOR position before carrying out this step.

  • Open a door and observe the interior courtesy lamps.

Are all the interior courtesy lamps inoperative?
Yes GO to B5
No GO to B3

B3 CHECK FOR VOLTAGE TO THE INOPERATIVE COURTESY LAMP
  • Ignition OFF.
  • Disconnect Inoperative Lamp.
  • Ignition ON.
  • Measure:

      Front Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C931A-1   Ground

      Rear Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C901A-1   Ground

      Cargo Lamp


    Positive Lead Measurement / Action Negative Lead
      C489-1   Ground

Is the voltage greater than 11 volts?
Yes GO to B4
No REPAIR the circuit.

B4 CHECK THE INOPERATIVE COURTESY LAMP GROUND CIRCUIT FOR AN OPEN
  • Close and open a front door.
  • Measure:

      Front Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C931A-1   C931B-1

      Rear Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C901A-1   C901B-1

      Cargo Lamp


    Positive Lead Measurement / Action Negative Lead
      C489-1   C489-2

Is the voltage greater than 11 volts?
Yes INSTALL a new interior lamp for the lamp in question.
No REPAIR the circuit.

B5 ISOLATE THE FRONT INTERIOR LAMP
  • Ignition OFF.
  • Disconnect Front Interior Lamp C931A .
  • Cycle the ignition ON and then OFF.
  • Open the driver front door.

Does the rear interior lamp illuminate?
Yes INSTALL a new front interior lamp.
No CLOSE the door. GO to B6

B6 ISOLATE THE CARGO LAMP
  • Disconnect Cargo Lamp C489 .
  • Cycle the ignition ON and then OFF.
  • Open the driver front door.

Does the rear interior lamp illuminate?
Yes INSTALL a new cargo lamp.
No CLOSE the door. GO to B7

B7 ISOLATE THE REAR INTERIOR LAMP
  • Disconnect Rear Interior Lamp C901A .
  • Cycle the ignition ON and then OFF.
  • Open the driver front door.
  • Measure:
    Positive Lead Measurement / Action Negative Lead
      C901A-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear interior lamp.
No GO to B8

B8 CHECK THE INTERIOR LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect BCM C2280F .
  • NOTE: Make sure the interior lamp switches are in the DOOR or COURTESY position before carrying out this step. Measure:
    Positive Lead Measurement / Action Negative Lead
      C2280F-17   C901A-1

Is the resistance less than 3 ohms?
Yes GO to B9
No REPAIR the circuit.

B9 CHECK THE INTERIOR LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Measure:
    Positive Lead Measurement / Action Negative Lead
      C2280F-17   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B10
No REPAIR the circuit.

B10 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors and related in-line connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST C: ALL THE COURTESY LAMPS STAY ON CONTINUOUSLY

Refer to Wiring Diagrams Cell 117 for schematic and connector information. Refer to Wiring Diagrams Cell 89 for schematic and connector information.

Normal Operation and Fault Conditions

The BCM sends a voltage signal to each door ajar switch (integrated into the door latch), which is routed to ground when the door is closed (the door ajar switch is closed when the door is closed). When the door is opened, the signal to ground is interrupted, indicating an open door to the BCM . When the BCM determines a door is open, the battery saver relay energizes (if not already energized) to supply voltage to the interior lamps and then the BCM provides ground to the courtesy lamps.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B1175:01 Drivers Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the LH front door ajar circuit.
BCM B1176:01 Passenger Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the RH front door ajar circuit.
BCM B1178:01 Boot/Trunk Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the tailgate ajar circuit.
BCM B11C0:01 Driver Side Rear Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the LH rear door ajar circuit.
BCM B11C1:01 Passenger Side Rear Door Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the RH rear door ajar circuit.
BCM B1306:01 Liftgate Ajar Switch: General Electrical Failure An on-demand DTC that sets when the BCM detects a fault on the tailgate ajar circuit.
BCM B1313:15 Interior Lighting Output: Circuit Short To Battery Or Open A continuous and on-demand DTC that sets when the BCM detects a short to ground from the courtesy lamp voltage supply.

Possible Sources

  • Wiring, terminals or connectors
  • Door latch
  • BCM
C1 CHECK THE DOOR AJAR SWITCH PARAMETER IDENTIFICATIONS (PIDS)

NOTE: The door ajar switches are integral to the door latches.

  • Ignition ON.
  • Using a diagnostic scan tool, enter the BCM DataLogger mode.
  • Monitor the BCM door ajar switch PIDS while opening and closing all the doors and tailgate.

Do all the door ajar switch PID values agree with the door and tailgate positions?
Yes GO to C4
No GO to C2

C2 BYPASS THE SUSPECT DOOR LATCH
  • Ignition OFF.
  • Disconnect Suspect Door Latch.
  • Ignition ON.
  • Connect a fused jumper wire:

      LH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C525-3   C525-5

      RH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C609-6   C609-4

      LH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C705-3   C705-5

      RH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C805-6   C805-4

      Tailgate Latch Assembly


    Positive Lead Measurement / Action Negative Lead
      C4223A-3   C4223A-5
  • Monitor the suspect BCM door ajar switch PID .

Does the PID indicate the tailgate or door in question is closed?
Yes REMOVE the fused jumper wire.
For a front door, INSTALL a new front door latch.
REFER to: Front Door Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). For a rear door, INSTALL a new rear door latch.
REFER to: Rear Door Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). For the tailgate, INSTALL a new tailgate latch assembly.
REFER to: Tailgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
No REMOVE the jumper wire. GO to C3

C3 BYPASS THE DOOR LATCH GROUND CIRCUIT
  • Connect a fused jumper wire between the suspect door latch, harness side and ground as follows:

      LH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C525-3   Ground

      RH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C609-6   Ground

      LH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C705-3   Ground

      RH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C805-6   Ground

      Tailgate Latch Assembly


    Positive Lead Measurement / Action Negative Lead
      C4223A-3   Ground
  • Monitor the suspect BCM door ajar switch PID .

Does the PID indicate the suspect door is closed?
Yes REMOVE the jumper wire. REPAIR the circuit.
No REMOVE the jumper wire. GO to C4

C4 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Measure the resistance between the suspect door ajar switch, harness side and the BCM , harness side as follows:

      LH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C525-3   C2280F-29

      RH Front Door Latch


    Positive Lead Measurement / Action Negative Lead
      C609-6   C2280F-32

      LH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C705-3   C2280F-33

      RH Rear Door Latch


    Positive Lead Measurement / Action Negative Lead
      C805-6   C2280F-34

      Tailgate Latch Assembly


    Positive Lead Measurement / Action Negative Lead
      C4223A-3   C2280F-16

Is the resistance less than 3 ohms?
Yes GO to C5
No REPAIR the circuit.

C5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors and related in-line connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST D: ONE OR MORE DEMAND LAMPS ARE INOPERATIVE

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

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B14AA:11 Demand Lamp Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the demand lighting output circuit.
BCM B14AA:15 Demand Lamp Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the demand lighting output circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Demand lamp
  • BCM

Visual Inspection and Pre-checks

  • Inspect the bulbs and make sure they are OK.
  • Inspect the courtesy lamp operation.
  • Inspect the interior lamp for damage.
D1 CHECK THE DEMAND LAMP OPERATION
  • Ignition ON.
  • Check the operation of the vanity mirrors, glove compartment and overhead map lamps.

Do any of the lamps illuminate?
Yes If a vanity mirror lamp is inoperative, GO to D3
If the glove compartment lamp is inoperative, GO to D5
If an overhead map lamp is inoperative, GO to D7
No VERIFY BCM fuse 1 (10A) is OK. If OK, GO to D2. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.

D2 CHECK THE DEMAND LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect Glove Compartment Lamp C254 .
  • Disconnect BCM C2280F .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C254-1   C2280F-72

Is the voltage greater than 11 volts?
Yes GO to D9
No REPAIR the circuit.

D3 CHECK THE VANITY MIRROR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect Inoperative LH Vanity Mirror Lamp C907 or RH Vanity Mirror Lamp C906 .
  • Ignition ON.
  • Measure:
    Click to display connectors

      LH Vanity Mirror Lamp


    Positive Lead Measurement / Action Negative Lead
      C907-1   Ground

    Click to display connectors

      RH Vanity Mirror Lamp


    Positive Lead Measurement / Action Negative Lead
      C906-1   Ground

Is the voltage greater than 11 volts?
Yes GO to D4
No REPAIR the circuit.

D4 CHECK THE VANITY MIRROR GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors

      LH Vanity Mirror Lamp


    Positive Lead Measurement / Action Negative Lead
      C907-1   C907-3

    Click to display connectors

      RH Vanity Mirror Lamp


    Positive Lead Measurement / Action Negative Lead
      C906-1   C906-3

Is the voltage greater than 11 volts?
Yes INSTALL a new sun visor for the lamp in question.
No REPAIR the circuit.

D5 CHECK THE GLOVE COMPARTMENT LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect Glove Compartment Lamp C254 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C254-1   Ground

Is the voltage greater than 11 volts?
Yes GO to D6
No REPAIR the circuit.

D6 CHECK THE GLOVE COMPARTMENT LAMP GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C254-1   C254-2

Is the voltage greater than 11 volts?
Yes INSTALL a new glove compartment lamp.
No REPAIR the circuit.

D7 CHECK THE INTERIOR LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect Inoperative Front Interior Lamp C931A .
  • Disconnect Inoperative Rear Interior Lamp C901A .
  • Ignition ON.
  • Measure:
    Click to display connectors

      Front Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C931A-2   Ground

    Click to display connectors

      Rear Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C901A-2   Ground

Is the voltage greater than 11 volts?
Yes GO to D8
No REPAIR the circuit.

D8 CHECK THE OVERHEAD INTERIOR LAMP GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect Inoperative Front Interior Lamp C931B .
  • Disconnect Inoperative Rear Interior Lamp C901B .
  • Ignition ON.
  • Measure:
    Click to display connectors

      Front Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C931A-2   C931B-1

    Click to display connectors

      Rear Interior Lamp


    Positive Lead Measurement / Action Negative Lead
      C901A-2   C901B-1

Is the voltage greater than 11 volts?
Yes For the front interior lamp, INSTALL a new front interior lamp.
For the rear interior lamp, INSTALL a new rear interior lamp.
No REPAIR the circuit.

D9 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors and related in-line connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

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

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

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

Possible Sources

  • Wiring, terminals, or connectors
  • BCM

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

E1 CHECK THE DEMAND LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Turn any map lamp on.

Does the map lamp turn on?
Yes REPAIR the circuit.
No GO to E2

E2 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors and related in-line connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST F: THE AMBIENT LIGHTING IS INOPERATIVE OR ALWAYS ON

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

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B145C:11 Ambient Lighting Power Supply Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the ambient light module conditioned power supply output circuit.
BCM B145C:15 Ambient Lighting Power Supply Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the ambient light module conditioned power supply output circuit.
BCM B1465:00 Ambient Lighting Bus 1: No Sub Type Information A continuous memory DTC that sets when the BCM detects a fault on an ambient lighting LIN circuit.
BCM B1467:00 Ambient Lighting Bus 3: No Sub Type Information A continuous memory DTC that sets when the BCM detects a fault on an ambient lighting LIN circuit.
BCM B153C:11 Color Ambient Light Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the ambient light module conditioned power supply output circuit.
BCM B153C:15 Color Ambient Light Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the ambient light module conditioned power supply output circuit.

Possible Sources

  • Wiring, terminals or connectors
  • FDIM
  • BCM
F1 CHECK THE FDIM (FRONT DISPLAY INTERFACE MODULE) AUDIO CONTROLS
  • Ignition ON.
  • Check the operation of the audio system using the FDIM (touchscreen) controls.

Does the audio system operate correctly from the touchscreen controls?
Yes GO to F2
No
REFER to: Audio System (415-00G) .

F2 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, perform the BCM self-test.

Is DTC B1465:00, B1467:00, B145C:11, B145C:15, B153C:11 or B153C:15 present?
Yes For DTC B1465:00 and B1467:00, GO to F3
For DTC B145C:11 and B153C:11, GO to F7
For DTC B145C:15 and B153C:15, GO to F8
No GO to F10

F3 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCM C2280D .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280D-31   Ground

Is voltage present?
Yes REPAIR the circuit.
No GO to F4

F4 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect LH Footwell Lamp C2056 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2056-2   C2280D-31

Is the resistance less than 3 ohms?
Yes GO to F5
No REPAIR the circuit.

F5 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND
  • Disconnect LH Front Door Handle Ambient Lighting Lamp C573 .
  • Disconnect LH Front Door Map Pocket Ambient Lighting Lamp C572 .
  • Disconnect RH Front Door Handle Ambient Lighting Lamp C649 .
  • Disconnect RH Front Door Map Pocket Ambient Lighting Lamp C672 .
  • Disconnect RH Footwell Lamp C2057 .
  • Disconnect Floor Console Cup Holder Ambient Lighting Lamp C3349 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2056-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to F6
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM after all other Diagnostic Trouble Codes (DTCs) have been addressed.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

F6 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO THE VOLTAGE SUPPLY CIRCUIT
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280D-31   C2280F-4

Is the resistance greater than 10,000 ohms?
Yes GO to F10
No REPAIR the circuit.

F7 CHECK THE AMBIENT LIGHTING VOLTAGE CIRCUIT FOR A SHORT TO GROUND
  • Disconnect BCM C2280F .
  • Disconnect LH Front Door Handle Ambient Lighting Lamp C573 .
  • Disconnect LH Front Door Map Pocket Ambient Lighting Lamp C572 .
  • Disconnect RH Front Door Handle Ambient Lighting Lamp C649 .
  • Disconnect RH Front Door Map Pocket Ambient Lighting Lamp C672 .
  • Disconnect LH Footwell Lamp C2056 .
  • Disconnect RH Footwell Lamp C2057 .
  • Disconnect Floor Console Cup Holder Ambient Lighting Lamp C3349 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280F-4   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to F10
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM after all other Diagnostic Trouble Codes (DTCs) have been addressed.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

F8 CHECK THE AMBIENT LIGHTING VOLTAGE CIRCUIT FOR AN OPEN
  • Disconnect BCM C2280F .
  • Disconnect LH Footwell Lamp C2056 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280F-4   C2056-1

Is the resistance greater than 10,000 ohms?
Yes GO to F9
No REPAIR the circuit.

F9 CHECK THE AMBIENT LIGHTING VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280F-4   Ground

Is voltage present?
Yes REPAIR the circuit.
No GO to F10

F10 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors and related in-line connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the Diagnostic Trouble Codes (DTCs).

PINPOINT TEST G: ONE OR MORE OF THE AMBIENT LIGHTING LIGHT EMITTING DIODES (LEDS) ARE INOPERATIVE OR DO NOT CHANGE INTENSITY

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

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B1465:00 Ambient Lighting Bus 1: No Sub Type Information A continuous memory DTC that sets when the BCM detects a fault on an ambient lighting LIN circuit.
BCM B1467:00 Ambient Lighting Bus 3: No Sub Type Information A continuous memory DTC that sets when the BCM detects a fault on an ambient lighting LIN circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Ambient lighting LED
  • BCM
G1 CHECK THE AMBIENT LIGHTING LIGHT EMITTING DIODES (LEDS)
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Observe the operation of all the ambient lighting Light Emitting Diodes (LEDs).

Are all the front door, floor console and footwell ambient lighting Light Emitting Diodes (LEDs) inoperative?
Yes GO to Pinpoint Test F
No GO to G2

G2 CHECK FOR VOLTAGE TO THE LED (LIGHT EMITTING DIODE)
  • Ignition OFF.
  • Disconnect Inoperative ambient lighting LED .
  • Ignition ON.
  • Place the headlamp switch in the PARKLAMPS position.
  • Measure:
    Click to display connectors

      Floor Console Cup Holder Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C3349-1   Ground

    Click to display connectors

      LH Footwell Lamp


    Positive Lead Measurement / Action Negative Lead
      C2056-1   Ground

    Click to display connectors

      RH Footwell Lamp


    Positive Lead Measurement / Action Negative Lead
      C2057-1   Ground

    Click to display connectors

      LH Front Door Map Pocket Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C572-1   Ground

    Click to display connectors

      LH Front Door Handle Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C573-1   Ground

    Click to display connectors

      RH Front Door Map Pocket Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C672-1   Ground

    Click to display connectors

      RH Front Door Handle Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C649-1   Ground

Is the voltage greater than 11 volts?
Yes GO to G3
No REPAIR the LED voltage supply circuit in question.

G3 CHECK THE LED (LIGHT EMITTING DIODE) GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors

      Floor Console Cup Holder Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C3349-1   C3349-3

    Click to display connectors

      LH Footwell Lamp


    Positive Lead Measurement / Action Negative Lead
      C2056-1   C2056-3

    Click to display connectors

      RH Footwell Lamp


    Positive Lead Measurement / Action Negative Lead
      C2057-1   C2057-3

    Click to display connectors

      LH Front Door Map Pocket Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C572-1   C572-3

    Click to display connectors

      LH Front Door Handle Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C573-1   C573-3

    Click to display connectors

      RH Front Door Map Pocket Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C672-1   C672-3

    Click to display connectors

      RH Front Door Handle Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C649-1   C649-3

Is the voltage greater than 11 volts?
Yes GO to G4
No REPAIR the ground circuit in question.

G4 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Place the headlamp switch in the OFF position.
  • Disconnect BCM C2280D .
  • Measure:
    Click to display connectors

      Floor Console Cup Holder Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C3349-2   C2280D-31

    Click to display connectors

      LH Footwell Lamp


    Positive Lead Measurement / Action Negative Lead
      C2056-2   C2280D-31

    Click to display connectors

      RH Footwell Lamp


    Positive Lead Measurement / Action Negative Lead
      C2057-2   C2280D-31

    Click to display connectors

      LH Front Door Map Pocket Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C572-2   C2280D-31

    Click to display connectors

      LH Front Door Handle Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C573-2   C2280D-31

    Click to display connectors

      RH Front Door Map Pocket Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C672-2   C2280D-31

    Click to display connectors

      RH Front Door Handle Ambient Lighting Lamp


    Positive Lead Measurement / Action Negative Lead
      C649-2   C2280D-31

Is the resistance less than 3 ohms?
Yes INSTALL a new ambient lighting LED in question.
No REPAIR the circuit.


    Description and Operation - Interior Lighting - System Operation and Component Description

    S..

    Electrical Distribution

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