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

PINPOINT TEST S: 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 and the transmission status over the high speed controller area network (HS-CAN) communication bus. When a fault condition exists in the electronic throttle control system or the transmission, the PCM provides the instrument cluster (IC) with a message to turn on the powertrain malfunction (wrench) warning indicator.

If the electronic throttle control or transmission 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 or transmission message is missing for greater than 5 seconds, the instrument cluster (IC) sets DTC U0101 and defaults the powertrain malfunction (wrench) warning indicator on.

NOTE: If U0101 is set in the instrument cluster (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
- Transaxle concern
- Instrument cluster (IC)

S1:

S2-S5: