Electronic Brake Control Module Replacement with LH2
Removal Procedure
Notice: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM
with the ignition switch in the OFF position. Failure to observe this precaution
could result in damage to the EBCM/EBTCM.
Important:
• | The ignition switch must be placed in OFF mode ONLY, before disconnecting the negative battery cable during this procedure. If the ignition switch is accidentally placed into ignition ON engine OFF mode, the control modules will be activated and
disconnecting the negative battery cable will cause various DTCs to be set. Refer to
Keyless Entry System Description and Operation. |
• | After the ignition switch is placed into OFF mode, a waiting period of 2 minutes must be observed to allow the high-speed LAN control modules to deactivate before disconnecting or connecting the negative battery cable during this procedure.
If the waiting period is not observed, one or more of these control modules may still be active, this will cause various DTCs to be set. |
- Place the ignition switch into OFF mode . Do NOT place the ignition switch into ignition ON engine OFF mode.
- Wait for a minimum of 2 minutes to allow the high-speed LAN control modules to deactivate.
- Disconnect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection.
- Thoroughly clean the electronic brake control module (EBCM) to brake pressure modulator valve (BPMV) area of any dirt or contaminants.
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle.
- Remove the two BPMV bracket-to-crossmember mounting bolts to improve access to the EBCM and connector.
- Support the ABS modulator assembly.
- Disconnect the electrical connector from the brake fluid pressure sensor.
- Depress the lock tab and release the cam (2) to disconnect the electrical connector from the EBCM (3).
- Remove the 4 EBCM-to-BPMV retaining bolts.
- Separate the EBCM (1) from the BPMV (2) by carefully pulling apart.
Installation Procedure
- Clean the sealing surface of the BPMV with denatured alcohol, or equivalent, and a clean shop cloth.
- Ensure the motor connector (3) is in place on the EBCM (1).
- Install the EBCM to the BPMV. Use care when aligning the EBCM (1) to the BPMV electrical terminals (2).
Notice: Refer to Fastener Notice in the Preface section.
- Install the 4 EBCM-to-BPMV retaining bolts. Tighten the bolts in a criss-cross pattern.
Tighten
Tighten the bolts to 5 N·m (44 lb in).
- Connect the electrical connector to the EBCM (3). Ensure the cam (2) is secured by the lock tab.
- Connect the electrical connector to the brake fluid pressure sensor.
- Install the two BPMV bracket-to-crossmember mounting bolts.
Tighten
Tighten the bolts to 27 N·m (20 lb ft).
- Lower the vehicle.
- Connect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection.
- If a new EBCM was installed, the EBCM must be programmed. Refer to
Service Programming System (SPS).
- Perform the
Diagnostic System Check - Vehicle.
- Refer to
Control Module References for programming and setup information.
Electronic Brake Control Module Replacement with LC3
Removal Procedure
- Thoroughly clean the electronic brake control module (EBCM) to brake pressure modulator valve (BPMV) area of any dirt or contaminants.
- Remove the BPMV. Refer to
Brake Pressure Modulator Valve Replacement
.
- Remove the 4 EBCM bolts.
- Separate the EBCM (1) from the BPMV (2) by carefully pulling apart.
- Ensure the motor connector (3) withdraws with the EBCM.
Installation Procedure
- Clean the sealing surface of the BPMV with denatured alcohol, or equivalent, and a clean shop cloth.
- Ensure the motor connector (3) is in place on the EBCM (1).
- Install the EBCM to the BPMV. Use care when aligning the EBCM (1) to the BPMV electrical terminals (2).
Notice: Refer to Fastener Notice in the Preface section.
- Install the 4 EBCM bolts. Tighten the bolts in an X pattern.
Tighten
• | First pass: Tighten the bolts to 3 N·m (27 lb in). |
• | Second pass: Tighten the bolts to 6 N·m (52 lb in). |
- Install the BPMV. Refer to
Brake Pressure Modulator Valve Replacement
.
- If installing a replacement EBCM, program the EBCM. Refer to
Control Module References
.
- Perform the
Diagnostic System Check - Vehicle
.