Pinpoint Tests - OSC Equipped Vehicle

Pinpoint Tests - OSC Equipped Vehicle





When the electrical connector or solenoid body is disconnected, inspect the connector for terminal condition, corrosion and contamination. Also inspect the connector seal for damage. Clean, repair or install new components as required.

Power is routed through the Transmission Solenoid Power Control (TSPC) relay (inside the PCM) to all transmission solenoids. If the power circuit to the transmission solenoids or the TSPC relay fails open, then all solenoids are failed electrically OFF. CHECK for open, short to ground or the transmission connector disconnected. The TSPC relay will disable power to the transmission solenoids when certain transmission DTCs are set.

Shift Solenoid Pre-Diagnosis

Solenoid Operation Chart





CB = Clutch brake

NC = Normally closed

NH = Normally high

NL = Normally low

a Solenoid state will change if vehicle is moving forward with the selector lever in the NEUTRAL position.

b Solenoid is On when vehicle is above 3 mph.

c All gears available upon driver request.

Pinpoint Tests


NOTE: Refer to all TSBs and On-Line Automotive Service Information System (OASIS) messages that pertain to the transmission concern and follow the procedure as described.

NOTE: Vehicles equipped with a 3.7L engine use PCM C175T.

NOTE: Vehicles equipped with a 5.0L or 6.2L engine use PCM C1381T.

NOTE: Vehicles equipped with a 3.5L engine use PCM C1551E.