P0748

Solenoid Pressure Regulation





Fault Symptoms
CHECK GEARBOX warning lamp is on.

TCM in Limp-Home mode.

Conditions
Shorting to ground/Open circuit

Shorting to battery positive (B+).

Short-circuited solenoid.

Diagnostic Help
The status of the pressure control solenoid can be ascertained with the diagnostics instrument.

The pressure control solenoid regulates the transmission's system pressure.

The pressure control solenoid can be activated with the diagnostics instrument.

- Activate "Solenoid Pressure Regulation"

Check The Wiring
Jiggle the wiring harness at several points and in different directions to reveal intermittent breaks and short circuits in the various leads. Observe the multimeter, test lamp or diagnostic instrument while carrying out this check.