Removal Procedure
- Remove the gear cover (3). Refer to Modulator Gear Cover Replacement .
- Remove the four Torx® head screws (5) that attach the motor pack (1).
- Remove the motor pack assembly (1).
Important: 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.
Important: Use care when handling the motor packs. Replace the motor packs if the motor packs are dropped or damages during handling.
Important: If the disassembly of the modulator/master cylinder assembly was caused by an ABS hydraulic functional test that did not pass, the Automated ABS brake motor pack Diagnosis Test should be performed. Refer to Scan Tool Diagnostics in Antilock Brakes. The Automated ABS brake motor pack Diagnosis Test isolates the motor pack or brake modulator.
No repair of the motor pack is authorized. Replace as an assembly.Installation Procedure
- With either of the modulators positioned upside down, rotate each ABS brake modulator gear counterclockwise until movement stops.
- Install the motor pack (1) to the modulator assembly (6).
- Install four Torx® head screws (4).
- Install the gear cover (3) onto the modulator/brake master cylinder assembly. Refer to Modulator Gear Cover Replacement .
The above procedure will cause the following conditions:
| • | The pistons on the ABS brake modulator will be positioned very close to the top of the modulator bore. |
| • | The brake bleeding procedure becomes simplified. Refer to Hydraulic Brake System Bleeding in brakes. |
Important: Use care when handling the motor packs. Replace the motor packs if the motor packs are dropped or damaged during handling.
Align each of the three motor pack pinions with the modulator gears.
Tighten
Tighten the Torx® head screws to 4.5 N·m (40 lb in).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
