Removal Procedure
- Remove the gear cover (3).
- Remove the 4 Torx® head screws (5) that attach the motor pack (1).
- Remove the motor pack assembly (1).
Important:
• Use care when handling the motor pack in order to avoid damaging
the motor pack connector. Ensure that the 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. • Use care when handling the motor packs. Replace the motor packs
if the motor packs are dropped or damaged during handling.
Important: If the disassembly of the modulator/master cylinder assembly was caused by an ABS or TCS hydraulic functional test that did not pass, perform the Automated ABS brake motor pack Diagnosis Test. Refer to Scan Tool Diagnostics . The Automated ABS brake motor pack Diagnosis Test isolates the motor pack or brake modulator.
No repair of the motor pack is authorized. Replace the motor pack as an assembly.Installation Procedure
- With either of the modulators positioned upside down, rotate each ABS brake modulator gear counterclockwise and rotate each TCS modulator gear clockwise until movement stops.
- Install the motor pack (1) to the modulator assembly (6).
- Install the 4 Torx® head screws (4).
- Install the gear cover (3) onto the modulator/brake master cylinder assembly.
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 pistons on the TCS modulator will be positioned very close to the bottom of the modulator bore. |
| • | The brake bleeding procedure becomes simplified. |
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 3 motor pack pinions (2 are on the TCS) with the modulator gears.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.
Tighten
Tighten the Torx® head screws to 4.5 N·m (40 lb in).
