Hyundai Elantra (CN7): ABS(Anti-Lock Brake System) / ESC (Electronic Stability Control) Module

Hyundai Elantra (CN7) 2021-2026 Service Manual / Brake System / ABS(Anti-Lock Brake System) / ESC (Electronic Stability Control) Module

Components and components location

Components
[LHD]

1. Front - right (FR)
2. Rear - left (RL)
3. Rear - right (RR)
4. Front - left (FL)
5. MC2
6. MC1
7. ABS control module (HECU)
8. Bracket

[RHD]

1. Front - right (FR)
2. Rear - left (RL)
3. Rear - right (RR)
4. Front - left (FL)
5. MC2
6. MC1
7. ABS control module (HECU)
8. Bracket

Repair procedures

Removal
[LHD]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Pull up the lock of the HECU connector and then disconnect the connector (A).

3.
Separate the brake tubes from the HECU by unlocking the nuts (6-ea) couterclockwise using a spanner.
Tightening torque :
12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)

Tightening torque :
18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb-ft)

4.
Loosen the ABS control module mounting nut and then remove the ABS control module (A) from the vehicle.
Tightening torque :
16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

5.
Separate the bracket (B) after remove the mounting bolt from the HECU (A).

[RHD]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the battery and battery tray.
(Refer to Engine Electrical System - "Battery")
3.
Pull up the lock of the HECU connector and then disconnect the connector (A).

4.
Separate the brake tubes from the HECU by unlocking the nuts (6-ea) couterclockwise using a spanner.
Tightening torque :
12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)

Tightening torque :
18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb-ft)

5.
Loosen the ABS control module mounting nut and then remove the ESC control module (A) from the vehicle.
Tightening torque :
16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

6.
Separate the bracket (B) after remove the mounting bolt from the HECU (A).

Installation
1.
To install, reverse the removal procedure.
2.
After installation, bleed the brake system.
(Refer to Brake System - "Brake Bleeding Prcoedures")
Adjustment
Perform diagnostic procedure by using diagnostic device as shown below.
1.
Connect self-diagnosis connector (16pins) located under the driver side crash pad to self-diagnosis device, and then turn the self-diagnosis device after key is ON.
2.
Select the "vehicle model" and "ESP/ESC" on GDS vehicle selection screen, then select OK.
[Variant Code Reset]

[Variant Coding]

[Longitudinal G Sensor Calibration]

    Terminal Function Pin No Description Current (AMPS) Resistance (mΩ) Remark 1POS.

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