ESC Control Module Repair Procedures

Removal

1. 1
   Turn the ignition off.
2. 2
   Disconnect the brake tubes from the HECU by turning the nuts counterclockwise with a flare nut wrench. Tightening torque: ABS: 12.7 ~ 16.7 N·m ESC: 18.6 ~ 23 N·m [LHD]

   

   [Right-hand drive]

   

3. 3
   Pull up the HECU connector lock, then disconnect the connector.
4. 4
   Loosen the bolts (A) and nut (B) of the HECU bracket, then remove the HECU and bracket.

   Tightening torque: 16.7 ~ 26 N·m

   [Left-hand drive]

   

   [Right-hand drive]

   

   Never attempt to disassemble the HECU. The HECU must be transported and stored in. Never strike the HECU.

5. 5
   Remove the 3 bolts, then remove the bracket from the HECU.

   Tightening torque: 10.8 ~ 13.7 N·m

Installation

1. 1
   Installation is the reverse of removal.
2. 2
   Tighten the HECU mounting bolts and nuts to the specified torque.
3. 3
   After installation, bleed the brake system. (Refer to ABS Bleeding)
4. 4
   Variant Coding. 2WD and 4WD vehicles share the same HECU. To apply the correct vehicle, the HECU must undergo variant coding. Variant coding is required when:

   A.	HECU is replaced.

   B.	DTC C1702 is detected (variant coding error).

   Perform variant coding.

   

   

5. 5
   Perform longitudinal sensor calibration. (Refer to ESC (Electronic Stability Control) — Longitudinal Acceleration Sensor)