Brake Modulator Assembly Replacement

Brake Modulator Assembly Replacement
Caution: Refer to Brake Fluid Irritant Caution.

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

Notice: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to observe this precaution could result in damage to the EBCM/EBTCM.

Removal Procedure




1. Turn the ignition switch to the OFF position.
2. Clean the brake modulator assembly pipe fitting areas of any accumulated dirt and foreign material.
3. Disconnect the electrical connector from the electronic brake control module (EBCM).




4. Place a shop towel under the brake modulator assembly to catch any brake fluid loss.

Important: Prior to disconnecting the brake pipes from the ABS modulator assembly, note the locations of the brake pipes to the valve assembly, to aid during installation.

5. Disconnect the caliper and wheel cylinder brake pipes (1) from the brake pressure modulator valve (BPMV).
6. Cap the brake pipe ends to prevent brake fluid loss and contamination.
7. Disconnect the master cylinder brake pipes (2) from the BPMV.
8. Cap the brake pipe ends to prevent brake fluid loss and contamination.
9. Plug the modulator brake pipe openings to prevent brake fluid loss and contamination.




10. Loosen the 2 insulator nuts (1) on the brake pressure modulator valve assembly.
11. Remove the brake modulator assembly from modulator bracket by pulling straight up.

Installation Procedure

Important: When installing a new brake modulator assembly, do NOT remove the shipping plugs from the pipe ports until after installation into the vehicle.

1. Install the brake modulator assembly to the modulator bracket.





Notice: Refer to Fastener Notice.

2. Tighten the 2 brake pressure modulator assembly insulator nuts (1).

Tighten the nuts to 8 N.m (71 lb in).




3. Remove the caps from the master cylinder brake pipe ends.
4. Remove the plugs from the master cylinder ports on the modulator assembly.
5. Connect the master cylinder brake pipes (2) to the modulator assembly, in the same location as removed.
6. Tighten the brake pipe fittings at the BPMV.

Tighten the fittings to 18 N.m (13 lb ft).

7. Remove the caps from the caliper and wheel cylinder brake pipe ends.
8. Remove the plugs from the caliper and wheel cylinder ports on the modulator assembly.
9. Connect the caliper and wheel cylinder brake pipes (1) to the modulator assembly, in the same location as removed.
10. Tighten the brake pipe fittings at the BPMV.

Tighten the fittings to 18 N.m (13 lb ft).




11. Connect the electrical connector to the EBCM.
12. Bleed the hydraulic brake system.
13. Turn the ignition switch to the ON position. DO NOT start engine.
14. Perform the Diagnostic System Check - Vehicle. Initial Inspection and Diagnostic Overview
15. Observe the feel of the brake pedal after performing the diagnostic system check. If the pedal now feels spongy, air may have been in the secondary circuit of the brake modulator assembly, which may have been introduced into the primary circuit. If the pedal feels spongy, perform the Antilock Brake System Automated Bleed Procedure.
16. Remove the shop towel and discard into an approved container.