P0748

Tests 1 - 2:

Tests 3 - 6:

Tests 7 - 10:

Tests 11 - 14:

Tests 15 - 17:

SYMPTOM
P0748 - GOVERNOR PRESSURE SOLENOID CONTROL/TRANSMISSION 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
- Governor pressure solenoid
- Governor pressure solenoid control circuit shorted to ground
- Transmission control relay
- Governor pressure resistance between 2.5 & 5.0 ohms
- Intermittent governor pressure solenoid
- Fused B(+) circuit open
- Transmission control relay output circuit open
- Transmission control relay output circuit shorted to ground
- PCM-Governor pressure below 1.0 volt
- Governor pressure solenoid control circuit open