Electronic Brake Control Module Replacement w/JL4

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

Important: After installation, calibrate the new electronic brake control module (EBCM) to the tire size that is appropriate to the vehicle.

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .




Important: The area around the electronic hydraulic control unit (EHCU) MUST be free from loose dirt to prevent contamination of disassembled ABS components.

3. Thoroughly wash all contaminants from around the EHCU.
4. Remove the mounting screws (1) that fasten the EBCM (2) to the brake pressure modulator valve (BPMV) (3).



5. Remove the EBCM from the BPMV. Removal may require a light amount of force.
6. Remove the EBCM from the vehicle.
7. Clean the BPMV to EBCM mounting surfaces with a clean cloth.

Important: 

•	Do not reuse the old mounting screws. Always install new mounting screws with the new EBCM.

•	Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

1. Install the EBCM to the BPMV.

Notice: Refer to Fastener Notice in the Preface section.




2. Install the new EBCM screws (1).

Tighten
Tighten the screws to 5 N·m (39 lb in) in an X-pattern.

3. Lower the vehicle.
4. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
5. If a new EBCM was installed, the EBCM must be programmed. Refer to Service Programming System (SPS) .
6. Turn the ignition to the ON position. DO NOT start the engine.
7. Perform the Diagnostic System Check - Vehicle .
8. Refer to Control Module References for programming and setup information.

Electronic Brake Control Module Replacement w/o JL4

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

Important: After installation, calibrate the new EBCM to the tire size that is appropriate to the vehicle.

1. Disconnect the negative battery cable.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.




Important: The area around the EHCU MUST be free from loose dirt to prevent contamination of disassembled ABS components.

3. Thoroughly wash all contaminants from around the EHCU (1).
4. Disconnect the electrical connectors from the EBCM.
5. Loosen or remove 3 bolts (4) securing the EHCU mounting bracket (3) to the frame rail (5).



6. Gently move the EHCU down enough to remove the four mounting screws that fasten the EBCM (2) to the BPMV (1).
7. Remove the EBCM (2) from the BPMV (1). Removal may require a light amount of force.
8. Clean the BPMV to EBCM mounting surfaces with a clean cloth.

Important: Do not reuse the old mounting screws. Always install new mounting screws with the new EBCM.

Important: Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

1. Install the EBCM (2) on to the BPMV (1).

Notice: Refer to Fastener Notice in the Preface section.

2. Install the four new screws in the EBCM (2).

Tighten
Tighten the four screws to 5 N·m (39 lb in) in an X-pattern.




3. Install or tighten three EHCU bracket mounting bolts (4).

Tighten
Tighten the EHCU bracket mounting bolts to 25 N·m (18 lb ft).

4. Connect the electrical connectors to the EBCM (1).
5. Lower the vehicle.
6. Connect the negative battery cable.
7. Revise the tire calibration using the Scan Tool Tire Size Calibration function.
8. Return to Diagnostic Starting Point - Antilock Brake System .
9. Refer to Control Module References for programming and setup information.