Pinpoint Test G: All the Courtesy Lamps Stay On Continuously
Interior Lighting
Pinpoint Test G: All the Courtesy Lamps Stay On Continuously
Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information. Diagrams By Number
Normal Operation
The Remote Function Actuator (RFA) module sends a voltage signal to each door ajar switch, which is routed to ground with the door closed (the door ajar switch is closed when the door is closed). The signal to ground is interrupted when the door is opened, indicating an open door to the RFA module.
The RFA module sends a voltage signal to the Liftgate/Trunk Module (LTM), which is routed to ground with the liftgate closed. When the liftgate is opened, the LTM opens the ground signal to the RFA module, indicating an open liftgate to the RFA module.
When the RFA receives a door or liftgate ajar input, it broadcasts the ajar message to the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN). When the SJB receives the ajar message, it provides voltage to the courtesy lamps.
NOTE: Make sure all of the doors and the liftgate are closed while carrying out the self-test.
Smart Junction Box (SJB) DTCs
Liftgate/Trunk Module (LTM) DTCs
Remote Function Actuator (RFA) Module DTCs
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door ajar switch
- LTM
- RFA module
PINPOINT TEST G: ALL THE COURTESY LAMPS 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.
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G1 CHECK THE SJB DTCs FROM THE ON-DEMAND SELF-TEST
- Review the recorded results from the SJB on-demand self-test.
- Is DTC B2A35 or DTC B2A39 present?
Yes
For DTC B2A35, GO to Pinpoint Test H. Pinpoint Test H: The Interior Courtesy Lamps Stay On Continuously
For DTC B2A39, GO to Pinpoint Test I. Pinpoint Test I: The Puddle Lamps Stay On Continuously
No
GO to G2.
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G2 CHECK THE DOOR AJAR PIDs
- Close all the doors.
- Enter the following diagnostic mode on the scan tool: RFA Module DataLogger .
- Monitor the RFA module door ajar PIDs as follows:
- Do all of the PIDs indicate the corresponding door is closed?
Yes
GO to G6.
No
GO to G3.
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G3 CHECK FOR A VOLTAGE SIGNAL TO THE DOOR AJAR SWITCH
- Ignition OFF.
- Disconnect: Suspect Door Ajar Switch .
- Measure the voltage between the suspect ajar switch, harness side and ground as follows:
- Is the voltage greater than 10 volts?
Yes
GO to G4.
No
GO to G5.
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G4 CHECK FOR A VOLTAGE SIGNAL TO THE DOOR AJAR SWITCH USING THE CONNECTOR GROUND
- Measure the voltage between the suspect ajar switch connector, harness side as follows:
- Is the voltage greater than 10 volts?
Yes
INSTALL a new door latch for the ajar switch in question. REFER to Handles, Locks, Latches and Entry Systems Front Door Latch. TEST the system for normal operation.
No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.
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G5 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN
- Disconnect: RFA Module C2153e .
- Measure the resistance between the suspect door ajar switch, harness side and the RFA module, harness side as follows:
- Is the resistance less than 5 ohms?
Yes
GO to G9.
No
REPAIR the ajar switch circuit in question for an open. TEST the system for normal operation.
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G6 CHECK THE LTM
- Ignition OFF.
- Disconnect: LTM C4174b .
- NOTE: If the fuse fails, repair the circuit for a short to voltage.
- Connect a fused jumper wire between the LTM C4174b-2, circuit CPL58 (GY/OG), harness side and ground.
- Wait 30 seconds and observe the courtesy lamps.
- Do the courtesy lamps turn off?
Yes
REMOVE the jumper wire. GO to G8.
No
REMOVE the jumper wire. GO to G7.
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G7 CHECK THE LIFTGATE AJAR SIGNAL CIRCUIT FOR AN OPEN
- Disconnect: RFA Module C2153e .
- Measure the resistance between the LTM C4174b-2, circuit CPL58 (GY/OG), harness side and the RFA module C2153e-22, circuit CPL58 (GY/OG), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to G9.
No
REPAIR circuit CPL58 (GY/OG) for an open. CLEAR the DTCs. REPEAT the self-test.
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G8 CHECK FOR CORRECT LTM OPERATION
- Disconnect all the LTM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the LTM 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 LTM. REFER to Body Closures Service and Repair. 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.
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G9 CHECK FOR CORRECT RFA MODULE OPERATION
- Disconnect all the RFA module connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RFA module 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 RFA module. REFER to Multifunction Electronic Modules Remote Function Actuator (RFA) Module. 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.
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