Brake Fluid Pump: Service and Repair

Brake Pressure Modulator Valve Pre-Charge Pump Replacement
Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in Service Precautions.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.





1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.

Crimp the inlet hose (1) from the master cylinder to the Pre-Charge Pump (PCP) (2) to prevent fluid from leaking out and draining the master cylinder reservoir.

2. Important: The area around the pre-charge pump MUST be free from loose dirt to prevent contamination of disassembled ABS components.

Remove the inlet hose clamp from the PCP assembly inlet port.
3. Remove the inlet hose (1) from the PCP assembly inlet port.
4. Loosen and remove the brake fluid outlet pipe (3). Cap or plug the brake pipe to prevent contamination and brake fluid lose.





5. Disconnect the PCP electrical connector from the vehicle connector harness.
6. Remove the PCP electrical connector from the mounting bracket.
7. Remove the PCP mounting bracket front bolt (2) and mounting bracket side bolts (3).
8. Remove the PCP assembly (1) from the vehicle.

Installation Procedure





1. Install the PCP (1) into the vehicle. Ensure the bottom of the PCP motor is secured in the bottom mounting grommet on the PCP mounting bracket.

2. Notice: Refer to Fastener Notice in Service Precautions.

Install the PCP front and side mounting bracket bolts (2,3).
Tighten the bolts to 15 Nm (10 ft. lbs.).
3. Install the PCP electrical connector to the mounting bracket. Check to insure the connector is locked into place.
4. Connect the PCP electrical connector to the vehicle connector harness.





5. Remove the cap or plug from the outlet pipe and install the outlet pipe (3) to the PCP (2).
Tighten the brake fluid outlet pipe nut to 25 Nm (18 ft. lbs.).
6. Install the inlet hose and clamp (1) to the PCP (2).
7. Remove the crimping tool from the inlet hose.
8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure.
9. Fill the master cylinder reservoir. Refer to Master Cylinder Reservoir Filling.
10. Using a scan tool, perform a precharge pump bleed procedure. Refer to ABS Automated Bleed Procedure (w/o JL4) ABS Automated Bleed Procedure (W/JL4),