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

PINPOINT TEST S: THE O/D OFF INDICATOR IS NEVER/ALWAYS ON (ESCAPE, MARINER)

S1-S4:

Normal Operation
The overdrive (O/D) off function is controlled by the O/D off switch. When the O/D off switch is pressed, the O/D off switch provides a ground to the PCM. The O/D off status is then transmitted to the instrument cluster from the PCM over the CAN circuits.

Possible Causes
- PCM
- instrument cluster