Test R: The Wrench Warning Indicator Is Never/Always On (Base Instrument Cluster)

PINPOINT TEST R: THE WRENCH WARNING INDICATOR IS NEVER/ALWAYS ON (BASE INSTRUMENT CLUSTER)

R1-R5:

Normal Operation
The instrument cluster receives the powertrain status from the powertrain control module (PCM) over the high speed controller area network (HS-CAN). When a system concern is detected, the PCM sends the instrument cluster a command signal to illuminate the 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 over the CAN to illuminate the 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 over the CAN to illuminate the wrench warning indicator.

Possible Causes
- 4WD system
- PCM
- TCM (4.6L engine)
- Instrument cluster