Hyundai i-30: ABS (Anti-Lock Brake System) / ABS Control Module

Hyundai i30 (PD) 2018-2024 Service Manual / Brake System / ABS (Anti-Lock Brake System) / ABS Control Module

Components and components location
Components
[LHD]

1. Front - right tube
2. Rear - left tube
3. Rear - right tube
4. Front - left tube
 5. MC SEC
6. MC PRI
7. ABS Control module (HECU)
8. Bracket

[RHD]

1. Front - right tube
2. Rear - left tube
3. Rear - right tube
4. Front - left tube
 5. MC SEC
6. MC PRI
7. ABS Control module (HECU)
8. Bracket

Repair procedures
Removal
[LHD]
1.
Turn the ignition switch OFF and then disconnect the negative (-) battery cable.
2.
Pull up the lock of the HECU connector (A), then disconnect the connector.
3.
Remove the brake fluid from the master cylinder reservoir with a syringe.
  
•
Be sure to completely remove foreign substances from around brake fluid reservoir and cap before opening the reservoir cap. If not, it may cause contamination of brake fluid and deterioration in braking performance.
•
Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
4.
Disconnect the brake tubes from the HECU by unlocking the nuts counterclockwise with a spanner.
Tightening torque :
12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)

5.
Loosen the HECU bracket bolts (A), then remove HECU and bracket.
Tightening torque :
16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

6.
Remove the 3 bolts, then remove the bracket from HECU.
Tightening torque :
7.8 - 9.8 N.m (0.8 - 1.0 kgf.m, 5.8 - 7.2 lb-ft)
[RHD]
1.
Turn the ignition switch OFF and then disconnect the negative (-) battery cable.
2.
Remove the battery.
(Refer to Engine Electrical System - "Battery")
3.
Remove the ECM
(Refer to Engine Control / Fuel System - "Engine Control Module (ECM)")
4.
Pull up the lock of the HECU connector and then disconnect the connector.
5.
Disconnect the brake tubes from the HECU by unlocking the nuts counterclockwise with a spanner.
Tightening torque :
12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)

6.
Loosen the HECU bracket bolts (A) and then remove HECU and bracket.
Tightening torque :
16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

7.
Remove the 3 bolts, then remove the bracket from HECU.
Tightening torque :
10.8 - 13.7 N.m (1.1 - 1.4 kgf.m, 8.0 - 10.1 lb-ft)
Installation
1.
To install, reverse the removal procedure.
2.
Tighten the HECU mounting bolts and nuts to the specified torque.
3.
After installation, bleed the brake system.
(Refer to ABS - "ABS System Bleeding")

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