Test Y: The O/D OFF Indicator Is Never/Always On

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

Normal Operation
The overdrive (O/D) off function is controlled by the O/D off switch located on the shifter assembly. The O/D OFF switch is hardwired to the PCM through circuit 224 (TN/WH). When the O/D OFF function is selected, voltage is supplied to the PCM. The O/D off status is transmitted to the instrument cluster (IC) from the PCM over the controller area network (CAN).

This pinpoint test is intended to diagnose the following:
- Transmission O/D off function
- PCM
- Instrument cluster (IC)

Y1-Y4:

Y5: