ESC Control Module Repair Procedures

Removal

1. 1
   Turn the ignition off.
2. 2
   Remove the air duct (B) and the air cleaner assembly (A).

   

3. 3
   Disconnect the connector and then secure the wiring harness (A).

   

4. 4
   Remove the brake fluid from the master cylinder reservoir using a syringe.

   Be sure to completely remove foreign material around the brake fluid reservoir and cap before opening the cap. If not, brake fluid may become contaminated and braking performance may deteriorate. Do not spill brake fluid on the vehicle, as it may damage the paint. If brake fluid gets on the paint, wash it off immediately with water.

5. 5
   Loosen the flare nuts and remove the brake tube (A).

   Tightening Torque: 18.6 ~ 23 N·m

   

6. 6
   Pull up the HECU connector lock (A), and then disconnect the connector.

   

7. 7
   Disconnect the brake tubes from the HECU by turning the nuts (B) counterclockwise with a wrench.

   Tightening torque: 12.7 - 16.7 N·m

8. 8
   Loosen the HECU bracket bolts (A), then remove the HECU and bracket.

   Tightening torque: 19.6 - 29 N·m

   

   Never attempt to disassemble the HECU. Never subject the HECU to impact.

9. 9
   Remove the bolts, and 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
   Always perform variant coding when replacing the HECU.
5. 5
   Connect GDS to the data link connector.
6. 6
   Turn the ignition on.
7. 7
   Select the vehicle name and system.
8. 8
   Select the variant coding option.

   

9. 9
   Perform variant coding according to the on-screen instructions.

   

   

10. 10
    Turn the ignition OFF, and then turn the ignition ON.
11. 11
    Variant coding is complete.