Pinpoint Tests AA: The Door Ajar Message Center Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AA: The Door Ajar Message Center Warning Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the door ajar switch status for the LH front door, RH front door, LH rear door and the RH rear door status 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 message center warning indicator. If the door ajar status message is missing for greater than 5 seconds, the IPC sets DTC U0140:00 and defaults the door ajar message center warning indicator on.

NOTE: If DTC U0140:00 is set in the SJB, other symptoms may 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 AA: THE DOOR AJAR MESSAGE CENTER WARNING INDICATOR IS NEVER/ALWAYS ON

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AA1 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 AA2.

No
REFER to Lighting and Horns.

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AA2 RETRIEVE THE RECORDED DTCs FROM THE CONTINUOUS IPC SELF-TEST


- Check for recorded DTCs from the continuous IPC self-test.
- Is DTC U0140:00 recorded?

Yes
GO to Pinpoint Test AW. Pinpoint Tests AW: DTC U0140:00

No
GO to AA3.

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AA3 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 AA4.

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AA4 CHECK THE MESSAGE CENTER OPERATION


- Ignition OFF.
- Disconnect: PCM C175b.
- Ignition ON.
- Monitor the message center display area with the PCM disconnected.
- Does the message center display the powertrain malfunction (wrench) message center warning indicator?

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) Instrument Panel Cluster (IPC). TEST the system for normal operation.

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