Test R: The Powertrain Malfunction (Wrench) Warning Indicator Is Never/Always On (Base Instrument Cluster [IC])

PINPOINT TEST R: THE POWERTRAIN MALFUNCTION (WRENCH) WARNING INDICATOR IS NEVER/ALWAYS ON (BASE INSTRUMENT CLUSTER [IC])

Normal Operation
The instrument cluster (IC) receives the powertrain status from the PCM over the high speed controller area network (HS-CAN). When a system concern is detected, the PCM sends the instrument cluster (IC) a command signal to illuminate the powertrain malfunction (wrench) warning indicator. If the 4WD control module detects a failure with the 4WD drive system, the 4WD control module sends a message to the instrument cluster (IC) over the CAN to illuminate the powertrain malfunction (wrench) warning indicator. On 4.6L engines, if the transmission control module (TCM) detects a failure with the transmission, the TCM sends a message to the instrument cluster (IC) over the CAN to illuminate the powertrain malfunction (wrench) warning indicator.

This pinpoint test is intended to diagnose the following:
- 4WD system concern
- Instrument cluster (IC)

R1:

R2-R5: