REMOVAL & INSTALLATION
The Anti-Lock Pressure Valve (APV), also known as the isolation/dump or control valve assembly, is not serviceable. The entire component must be replaced as an assembly should a malfunction be found.
- Turn the ignition switch OFF . The switch MUST be OFF whenever you are connecting/disconnecting power from the module (as will be done later in this procedure). Failure to do this may destroy the computer.
- Tag and disconnect the brake line fittings at the valve, then immediately cap or plug all openings to prevent system contamination or excessive fluid loss. Remember to protect the surrounding paint work from damage by fluid spillage.
- Disengage the bottom connector from the RWAL ECU/EBCM. At no time should you allow the APV to hang by the wiring.
Do not touch the electrical connectors or pins. Do not allow the connectors to contact brake fluid. If contaminated with brake fluid, clean with water followed by isopropyl alcohol.
- Remove the bolts holding the valve to the bracket.
- Remove the valve from the vehicle.
- Place the valve in position and install the retaining bolts. Tighten the bolts to 21 ft. lbs. (29 Nm).
- Engage the electrical harness to the RWAL ECU/EBCM.
- Remove the caps or plugs, then install the brake lines and tighten the fittings to 18 ft. lbs. (24 Nm).
- Properly bleed the RWAL hydraulic brake system at all 4 wheels.