Volt

Brake Master Cylinder Reservoir Hose Replacement

Warning: Refer to Brake Fluid Irritant Warning in the Preface section.

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution in the Preface section.

Note: The transmission must be in the PARK position, the power button in the OFF position, and the brakes not applied to ensure the brake modulator and high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1 to 3 minutes.

1. Place the transmission in PARK.
2. Place the power button in the OFF position.
3. Remove the remote keyless entry (RKE) transmitter and close all of the vehicle doors.

Note: During the pressure relief process, the fluid level in the master cylinder reservoir will rise. Do not remove the master cylinder reservoir cap during the pressure relief process.

4. Wait approximately 3 minutes for the HPA pressure relief to occur.
5. Remove the bolt and position aside the engine wiring junction block.



6. Disconnect the brake master cylinder reservoir supply hose quick connects (1).
7. Remove the brake master cylinder reservoir supply hose.
8. Cap the brake pressure modulator valve (BPMV) inlet port to prevent brake fluid loss and contamination.



9. Disconnect the brake master cylinder reservoir return hose quick connects (1).
10. Remove the brake master cylinder reservoir return hose.
11. Cap the BPMV outlet port to prevent brake fluid loss and contamination.

1. Install the brake master cylinder reservoir return hose.
2. Connect the brake master cylinder reservoir return hose quick connects (1).
3. Ensure the brake master cylinder reservoir return hose quick connects are fully engaged by attempting to pull the return hose from the fittings.



4. Install the brake master cylinder reservoir supply hose.
5. Connect the brake master cylinder reservoir supply hose quick connects (1).
6. Ensure the brake master cylinder reservoir supply hose quick connects are fully engaged by attempting to pull the supply hose from the fittings.
7. Install the engine wiring junction block and bolt.
8. Fill the brake master cylinder reservoir. Refer to Master Cylinder Reservoir Filling .