For 1990-2009 cars

The UHFB supplies the solenoid circuits with battery voltage when the ignition is in run. The ABS control module (EBTCM) controls valve function by grounding the solenoid circuit when necessary.

• | #1 solenoids are outlet valves.

• | #2 solenoids are inlet valves.

### DTC Parameters

DTC will set if the ABS control module detects an open, short to ground or short to voltage on the solenoid circuit(s) inside the control module.

When any of the above DTCs set:

• | The ABS telltale will be on.

• | The ABS control module will disable ABS.

• | Dynamic Rear Proportioning (DRP) limited to hold function only.

### Diagnostic Aids

The ABS control module must be replaced.