Pinpoint Tests AA: The Powertrain Malfunction (Wrench) Message Center Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AA: The Powertrain Malfunction (Wrench) Message Center Warning Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the powertrain malfunction data from the PCM for the Electronic Throttle Control (ETC) status and the transaxle status and from the 4X4 control module for the All-Wheel Drive (AWD) status over the High Speed Controller Area Network (HS-CAN) communication bus. When a fault condition exists in the ETC system or in the transaxle, the PCM provides the IPC with a message to turn the powertrain malfunction (wrench) message center warning indicator on. When a AWD fault condition exists, the 4X4 control module sends the IPC a message to turn the powertrain malfunction (wrench) message center warning indicator on.

If the ETC, transaxle or AWD message is missing for less than 5 seconds, the powertrain malfunction (wrench) message center warning indicator remains in the last indication mode (on/off) based upon the last known good message.

If the ETC or transaxle status message is missing for greater than 5 seconds, the IPC sets DTC U0100:00 and defaults the powertrain malfunction (wrench) message center warning indicator on.

If the AWD status message is missing for greater than 5 seconds, the IPC sets DTC U0102:00 and defaults the powertrain malfunction (wrench) message center warning indicator on.

NOTE: If U0100:00 is set in the IPC, other symptoms may also be present such as an inoperative speedometer, tachometer or temperature gauge.

This pinpoint test is intended to diagnose the following:

- ETC system concern
- AWD concern
- Transaxle concern
- IPC

PINPOINT TEST AA: THE POWERTRAIN MALFUNCTION (WRENCH) MESSAGE CENTER WARNING INDICATOR IS NEVER/ALWAYS ON

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AA1 CHECK THE MESSAGE CENTER WARNING INDICATOR FUNCTION

- Close all doors, hood and liftgate.
- Ignition ON.
- Open the driver door while monitoring the door ajar message center warning indicator.
- Does the driver door ajar message center warning indicator turn off with the driver door closed and turn on with the driver door open?

Yes
GO to AA2.

No
GO to Pinpoint Test AD. Pinpoint Tests AD: The Message Center Is Not Operating Correctly

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AA2 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

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

Yes
For DTC U0100:00, GO to Pinpoint Test AO. Pinpoint Tests AO: DTC U0100:00

For DTC U0102:00, GO to Pinpoint Test AP. Pinpoint Tests AP: DTC U0102:00

For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center, and Warning Chimes

No
GO to AA3.

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AA3 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST

- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?

Yes
DIAGNOSE all PCM DTCs. REFER to the Computers and Control Systems.

No
DIAGNOSE all 4X4 control module DTCs first. REFER to Four Wheel Drive (4WD) Systems Special Tool(s) Used With Diagnostics.

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