Pressure Regulator Solenoid

Pressure Regulator Solenoid Description

The lock-up and brake clutches are operated by pressurised transmission fluid from the valve block in the sump. The pressure regulator solenoid valve modulates the pressure of the supplies to the brake clutches, to control shift quality.

There are two diagnostic checks of the pressure regulator solenoid, an error is detected if:
1. The ignition supply is greater than 9V and edge detection has indicated a short circuit to battery positive.
2. The ignition supply is greater than 9V and edge detection has indicated an open circuit or a short circuit to ground.

For the diagnostic table, please refer to the individual code (i.e. P0748).

If the above table does not include details of the following enabling conditions: - AT, ECT, vehicle speed range, and time after engine start-up then the state of these parameters has no influence upon the execution of the monitor.