Pinpoint Test T: The Door Ajar Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests


Pinpoint Test T: The Door Ajar Warning Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the door ajar status for the LH and RH front door from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN) communication bus. When the IPC receives a message from the SJB that one or more doors are open or ajar, the IPC turns on the door ajar warning indicator.

If the door ajar status message is missing for less than 5 seconds, the door ajar warning indicator remains in the last indication mode (on or off) based upon the last known good message received.

If the door ajar status message is missing for greater than 5 seconds, the IPC sets DTC U0140:87 and defaults the door ajar warning indicator on.

NOTE: If DTC U0140:87 is set in the SJB, other symptoms can also be present in the IPC such as high beam indicator, RH/LH turn indicators, instrument panel backlighting and Tire Pressure Monitoring System (TPMS).

This pinpoint test is intended to diagnose the following:

- Interior lighting concern
- SJB
- IPC



PINPOINT TEST T: THE DOOR AJAR WARNING INDICATOR IS NEVER/ALWAYS ON

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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T1 CHECK THE INTERIOR LIGHTING OPERATION


- Open and close each door while monitoring the courtesy lamps.
- Do the courtesy lamps operate correctly with each door?

Yes
GO to T2.

No
REFER to Lighting and Horns.

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T2 RETRIEVE THE RECORDED DTCs FROM THE CONTINUOUS IPC SELF-TEST


- Check for recorded IPC DTCs from the continuous self-test.
- Is DTC U0140:87 recorded?

Yes
GO to Pinpoint Test AS. Pinpoint Tests AS: DTC U0140:87

No
GO to T3.

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T3 RETRIEVE THE RECORDED DTCs FROM THE SJB SELF-TEST


- Check for recorded DTCs from the SJB self-test.
- Are any SJB DTCs recorded?

Yes
REFER to Body Control Systems for correct navigation of the DTC.

No
GO to T4.

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T4 CARRY OUT THE IPC DOOR AJAR WARNING INDICATOR ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC door ajar warning indicator (DOOR_AJAR) active command. Command the door ajar warning indicator on and off while observing the door ajar warning indicator.
- Does the door ajar warning indicator illuminate when commanded on, and turn off when commanded off?

Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.

No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

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