Test I: the O/D Off Indicator Is Never/Always On

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

I1-I3:

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 status is transmitted to the instrument cluster from the powertrain control module (PCM) over the communication network.

Possible Causes
- PCM
- instrument cluster