Pinpoint Test X: The Powertrain Malfunction (Wrench) Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes


Pinpoint Tests


Pinpoint Test X: The Powertrain Malfunction (Wrench) Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the powertrain malfunction (wrench) status from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. The PCM monitors the Electronic Throttle Control (ETC) system status and transmission status. When a fault condition exists in the ETC system or in the transmission, the PCM provides the IPC with a message to turn the powertrain malfunction (wrench) indicator on.

If the ETC or transmission message is missing for less than 5 seconds, the IPC defaults the powertrain malfunction (wrench) indicator to the last on/off state, based upon the last known good ETC or transmission message received.

If the ETC message is missing for greater than 5 seconds, the IPC sets DTC U0100:00 and defaults the powertrain malfunction (wrench) indicator on. If the transmission message is missing for greater than 5 seconds, the IPC sets DTC U0101:00 and defaults the powertrain malfunction (wrench) 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 concern
- Transmission concern
- IPC



PINPOINT TEST X: THE POWERTRAIN MALFUNCTION (WRENCH) INDICATOR IS NEVER/ALWAYS ON

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X1 CHECK THE POWERTRAIN MALFUNCTION (WRENCH) OFF INDICATOR USING THE IPC DEALER TEST MODE


- Ignition ON.
- Enter Instrument Panel Cluster (IPC) Dealer Test Mode.
- Scroll down to the TELtAL tESt (base IPC) or TELLTALE TEST (message center IPC) display.
- Monitor the powertrain malfunction (warning) indicator.
- Is the powertrain malfunction (warning) indicator illuminated?

Yes
GO to X2.

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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X2 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 AT. Pinpoint Tests AT: DTC U0100:00

For DTC U0101:00, Go To Pinpoint Test AU. Pinpoint Tests AU: DTC U0101:00

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

No
GO to X3.

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X3 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 first. REFER to Computers and Control Systems Information.

No
INSTALL a new PCM. TEST the system for normal operation.

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