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

PINPOINT TEST T: 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. When the transmission is placed in the O/D off position, the O/D off switch provides voltage to the PCM through circuit 224 (TN/WH). The O/D off status is then transmitted to the instrument cluster (IC) from the PCM over the communication network.

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

T1-T2:

T2-T4: