Sensor Block: Removal
- Depressurize hydraulic accumulator by pumping the brake pedal a minimum of 25 times. See DEPRESSURIZING HYDRAULIC ACCUMULATOR under BLEEDING
- Disconnect all electrical connections at the hydraulic unit and pump/motor assembly.
- Remove sensor block cover retaining bolt and remove sensor block cover. Take care not to damage the cover gasket during removal. See Fig 1.
- Using fingers or a small screwdriver, disengage the locking tabs and disconnect the valve block connector (12-pin) from the sensor block.
- Disengage the reed block connector (marked "PUSH") by carefully pulling outward on the Orange connector body. The connector is partially retained by a plastic clip and will only move outward approximately 1/2 inch (13 mm).
- Remove the three sensor block retaining bolts.
- Carefully disengage the sensor block pressure port from the booster/master cylinder assembly and remove the sensor block from car. The sensor block pressure port is sealed with an "O" ring and extra care should be taken to prevent damage to the seal.
- Inspect sensor block pressure port "O" ring for damage. Replace "O" ring if cut or damaged.
- Inspect sensor block wiring and connector for proper retention and routing, or damage. Correct any damage or replace sensor block if damage cannot be corrected.
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.