P0748

Test 1:

Tests 2 - 6:

Tests 7 - 10:

Tests 11 - 14:

Tests 15 - 18:

SYMPTOM
P0748-PRESSURE SOLENOID CONTROL/TRANS RELAY CIRCUITS

WHEN MONITORED
Continuously with the key ON.

SET CONDITION
This code will set if the voltage detected on the Governor Pressure Solenoid Control circuit at the PCM is different than the expected voltage.

POSSIBLE CAUSES
- P1765 DTC present
- Intermittent governor pressure solenoid
- Transmission relay output
- Fused B+ circuit open
- Governor pressure solenoid control circuit open
- Governor pressure solenoid control circuit open internal
- Transmission control relay output circuit open
- Governor pressure solenoid control circuit short to ground
- Governor pressure solenoid control circuit short to ground internal
- Transmission relay output circuit short to ground
- Governor pressure solenoid control circuit short to voltage
- Governor pressure solenoid control circuit short to solenoid circuits internal
- Governor pressure solenoid control circuit short to other circuits
- Governor pressure solenoid control circuit short to other circuits internal
- Transmission control relay - poor contacts
- PCM - governor pressure solenoid control circuit