Hyundai Tucson: ESC(Electronic stability system) System / ESC Control Unit Repair procedures

Removal
1.
Turn the ignition switch OFF.
2.
Disconnect the brake tubes from the HECU by unlocking the nuts counterclockwise with a spanner.

Tightening torque :
ABS : 12.7 ~ 16.7N.m(1.3 ~ 1.7kgf.m, 9.4 ~ 12.3lb-ft)
ESC : 18.6 ~ 22.6N.m(1.9 ~ 2.3kgf.m, 13.7 ~ 16.6lb-ft)

[LHD]

[RHD]

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

Tightening torque :
16.7 ~ 25.5N.m(1.7 ~ 2.6kgf.m, 12.3 ~ 18.8lb-ft)

[LHD]

[RHD]

   
1.
Never attempt to disassemble the HECU.
2.
The HECU must be transported and stored in.
3.
Never shock to the HECU.
5.
Remove the 3 bolts, then remove the bracket from HECU.

Tightening torque :
10.8 ~ 13.7N.m(1.1 ~ 1.4kgf.m, 8.0 ~ 10.1lb-ft)

Installation
1.
Installation is the reverse of removal.
2.
Tighten the HECU mounting bolts and nuts to the specified torque.
3.
After installation, bleed the brake system.
(Refer to ABS bleeding)
4.
Variant coding.
2WD and 4WD vehicle are sharing the HECU each other. To apply appropriate vehicle, HECU needs to variant coding process.
Variant coding process is necessary when :
A.
HECU is replaced.
B.
C1702 DTC(variant coding error) code is detected.
Perform the Variant coding.

5.
Perform the Longitudinal Sensor Calibration.
(Refer to ESC (Electronic stability system) - "Longitudinal G Sensor")
[Auto Detected Sensor Calibration]

[Hill Start Assist Control Setting]

[Longitudinal G Sensor Calibration]

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