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

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

Normal Operation
The PCM, the transmission control module (TCM) and the 4X4 control module (if equipped) monitor the powertrain system and provide the instrument cluster (IC) with the operating status over the communication network. When a system concern is detected, the PCM, the TCM or the 4X4 control module provide the instrument cluster (IC) with a signal commanding the instrument cluster (IC) to illuminate the powertrain malfunction (wrench) warning indicator.

This pinpoint test is intended to diagnose the following:
- TCM
- PCM
- 4X4 control module (if equipped)
- Instrument cluster (IC)

U1-U8:

U8-U12: