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

Instrumentation and Warning Chimes

Pinpoint Tests

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

Normal Operation

The Instrument Cluster (IC) receives the powertrain malfunction data from the PCM for the electronic throttle control status over the High Speed Controller Area Network (HS-CAN) communication bus. When a fault condition exists in the electronic throttle control system, the PCM provides the IC with a message to turn on the powertrain malfunction (wrench) warning indicator.

If the electronic throttle control message is missing for 5 seconds or less, the powertrain malfunction (wrench) warning indicator remains in the last indication mode (on or off), based upon the last known good data message. If the electronic throttle control message is missing for greater than 5 seconds, the IC sets DTC U0100 and defaults the powertrain malfunction (wrench) warning indicator on.

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

This pinpoint test is intended to diagnose the following:

- Electronic throttle control concern
- IC


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

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R1 CARRY OUT THE IC INDICATOR LAMP CONTROL 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 (ETC_IND) active command. Command the powertrain malfunction (wrench) warning indicator on and off. Observe the powertrain malfunction (wrench) warning indicator.
- Does the powertrain malfunction (wrench) warning indicator illuminate when commanded on, and turn off when commanded off?

Yes
GO to R2.

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

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R2 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


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

Yes
For DTC U0100, GO to Pinpoint Test AJ. Pinpoint Test AJ: DTC U0100

For all other DTCs, REFER to DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures

No
GO to R3.

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R3 RETRIEVE THE RECORDED DTCs FROM THE KOEO PCM SELF-TEST


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

Yes
REFER to Computers and Control Systems.

No
If the powertrain malfunction (wrench) warning indicator is always on, INSTALL a new PCM. REFER to Electronic Engine Controls Service and Repair. TEST the system for normal operation.

If the powertrain malfunction (wrench) warning indicator is never on, the system is functioning correctly.

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