Test Z: The O/D Off Indicator Is Never/Always On

PINPOINT TEST Z: THE O/D OFF INDICATOR IS NEVER/ALWAYS ON

Normal Operation
The transmission control module (TCM) monitors the overdrive (O/D) off switch status. When the O/D function is selected off, the TCM sends a message to the instrument cluster (IC) over the communication network to turn on the O/D OFF indicator.

This pinpoint test is intended to diagnose the following:
- TCM
- Instrument cluster (IC)

Z1:

Z2-Z5: