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

Instrumentation, Message Center and Warning Chimes

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

Normal Operation

The PCM monitors the electronic throttle control and the transmission system and provides the Instrument Cluster (IC) with the operating status over the Controller Area Network (CAN). When a system concern is detected, the PCM provides the IC with a command signal to the IC to illuminate the powertrain malfunction (wrench) warning indicator.

This pinpoint test is intended to diagnose the following:

- PCM
- IC



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

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W1 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST


- Retrieve the recorded PCM DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?

Yes
REFER to Computers and Control Systems Information.

No
GO to W2.

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W2 CARRY OUT THE IC INDICATOR LAMP ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC powertrain malfunction (wrench) warning indicator (NON_MIL) active command on and off. Observe the powertrain malfunction (wrench) warning indicator.
- Does the powertrain malfunction (wrench) warning indicator illuminate when selected on, and turn off when selected off?

Yes
INSTALL a new PCM. TEST the system for normal operation.

No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

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