P0748

Tests 1 - 2:

Tests 3 - 7:

Tests 8 - 12:

Tests 13 - 16:

Tests 17 - 21:

Tests 22 - 23:

SYMPTOM
P0748 - GOVERNOR PRESSURE SOLENOID CONTROL/TRANSMISSION RELAY CIRCUITS

WHEN MONITORED
Continuously with the key ON.

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

POSSIBLE CAUSES
- Fused B(+) feed to transmission control relay open
- Governor pressure solenoid
- Solenoid and harness assembly
- Transmission control relay
- Governor pressure solenoid wiring & connectors intermittent defect
- Governor pressure solenoid wiring & connectors observable defect
- Transmission relay output circuit open
- Transmission Relay output circuit shorted to ground
- PCM
- PCM (resistance in range)
- GOV pressure solenoid control circuit shorted to ground
- Governor pressure solenoid control circuit open
- PCM (Transmission harness/solenoid)
- PCM (Governor pressure solenoid)
- PCM (shorted to circuits)