ABS Motor Pack Replacement

Notice: Use care when handling the motor pack to avoid damaging the motor pack connector. Make sure brake fluid does not accidentally intrude into the motor pack. Brake fluid in the motor pack may cause a premature failure of the motor pack.

Notice: Use care when handling the motor packs. Replace the motor packs if the motor packs are dropped or damaged during handling.

Important: Perform the Automated ABS brake motor-pack Diagnosis Test, when the disassembly of the brake modulator and motor-pack assembly was caused by an ABS hydraulic functional test that did not pass. Refer to the Scan Tool Diagnostics. The Automated ABS brake motor-pack Diagnosis Test isolates the motor-pack or the brake modulator.

Important: A repair of the motor-pack is not authorized. Replace the motor-pack assembly.

1. Perform the procedure called Gear Tension Relief Sequence.
2. Remove the hydraulic modulator assembly. Refer to Brake Modulator Assembly Replacement. Brake Modulator Assembly Replacement
3. Remove the 6 screws (5) that attach the gear cover (4).
4. Remove the gear cover (4) from the brake motor-pack assembly (1).
5. Remove the 4 screws (6) that attach the brake motor-pack assembly (1) to the hydraulic modulator (2).
6. Remove the brake motor-pack assembly (1) from the hydraulic modulator (2).

Installation Procedure





1. With the hydraulic modulator upside down, and the gears facing you, rotate each hydraulic modulator gear counterclockwise until movement stops. this procedure will position the pistons very close to the top of the modulator bore, simplifying the brake bleeding procedure.

Important: Use care when handling the motor-pack assembly. Replace the motor-pack assembly if the motor-pack assembly is dropped or is damaged during handling.

2. Install the brake motor pack (1) to the hydraulic modulator. Align each of the 3 motor-pack assembly pinions with the modulator gears.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the screws (6) that attach the brake motor-pack assembly (1) to the hydraulic modulator (2).
- Tighten the 4 head screws to 5 Nm (44 inch lbs.).
4. Install the gear cover (4) to the brake motor-pack assembly (1).
5. Install the 6 screws (5) that attach the gear cover (4).
- Tighten the 6 screws to 4 Nm (36 inch lbs.).
6. Install the hydraulic modulator assembly. Refer to Brake Modulator Assembly Replacement. Brake Modulator Assembly Replacement
7. Using the scan tool, perform the motor rehome procedure.
8. Perform A Diagnostic System Check - ABS. Diagnostic System Check