Vacuum Brake Booster Check Valve: Service and Repair

Brake Delay Valve Replacement
Warning: Refer to Brake Fluid Irritant Warning (Brake Fluid Irritant Warning).

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution (Vehicle Damage Warnings).

Removal Procedure

1. Turn the ignition switch to the OFF position.
2. Remove the 12V battery. Refer to Battery Replacement (Battery Replacement).
3. Without draining the coolant or removing the hoses, remove and position aside the radiator surge tank. Refer to Radiator Surge Tank Replacement (Service and Repair).




4. Disconnect the brake delay valve electrical connector (1).




5. Loosen, but do not remove, the primary brake pipe fitting at the master cylinder pressure sensor mounting block.
6. Disconnect the primary brake pipe inlet fitting (1) at the brake delay valve.
Rotate the brake pipe aside and cap the brake pipe fitting to prevent brake fluid loss and contamination.




7. Loosen, but do not remove, the secondary brake pipe fitting at the master cylinder.
8. Disconnect the secondary brake pipe inlet fitting (1) at the brake delay valve.
Rotate the brake pipe aside and cap the brake pipe fitting to prevent brake fluid loss and contamination.




9. Loosen, but do not remove, the primary brake pipe fitting at the brake pressure modulator valve (BPMV).
10. Disconnect the primary brake pipe outlet fitting (1) at the brake delay valve.
Rotate the brake pipe aside and cap the brake pipe fitting to prevent brake fluid loss and contamination.




11. Loosen, but do not remove, the secondary brake pipe fitting at the BPMV.
12. Disconnect the secondary brake pipe outlet fitting (1) at the brake delay valve.
Rotate the brake pipe aside and cap the brake pipe fitting to prevent brake fluid loss and contamination.




13. Remove the 2 brake delay valve bolts (1).
14. Remove the brake delay valve.

Installation Procedure




1. Install the brake delay valve.

Caution: Refer to Fastener Caution (Fastener Caution).

2. Install the 2 brake delay valve bolts (1).

Tighten the bolts to 10 Nm (89 lb in).




3. Connect the secondary brake pipe outlet fitting (1) at the brake delay valve.

Tighten the fitting to 18 Nm (13 lb ft).

4. Tighten the secondary brake pipe fitting at the BPMV.

Tighten the fitting to 18 Nm (13 lb ft).




5. Connect the primary brake pipe outlet fitting (1) at the brake delay valve.

Tighten the fitting to 18 Nm (13 lb ft).

6. Tighten the primary brake pipe fitting at the BPMV.

Tighten the fitting to 18 Nm (13 lb ft).




7. Connect the secondary brake pipe inlet fitting (1) at the brake delay valve.

Tighten the fitting to 18 Nm (13 lb ft).

8. Tighten the secondary brake pipe fitting at the master cylinder.

Tighten the fitting to 18 Nm (13 lb ft).




9. Connect the primary brake pipe outlet fitting (1) at the brake delay valve.

Tighten the fitting to 18 Nm (13 lb ft).

10. Tighten the primary brake pipe fitting at the master cylinder pressure sensor mounting block.

Tighten the fitting to 18 Nm (13 lb ft).




11. Connect the brake delay valve electrical connector (1).
12. Install the radiator surge tank. Refer to Radiator Surge Tank Replacement (Service and Repair).
13. Install the 12V battery. Refer to Battery Replacement (Battery Replacement).
14. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding (Manual) (Service and Repair)Hydraulic Brake System Bleeding (Pressure) (Service and Repair).