Anti-Lock Braking System Modulator: Replacement
- Carefully replace ECU on the replacement HCU.
- Torque the ECU bolts in the following two steps:
- Start all bolts into the HCU and hand tighten.
- Torque in the sequence shown until a final achieved for each bolt.
- Tightening torque: 1.3-1.4 ft. lbs (1.7-7.9 N.m, 0.18-1.2 kg. m)
- Reattach bracket to the HECU mounting pin and grommet.
- Tightening torque: 5.8-7.2 ft. lbs (7.8-9.8 N.m, 0.8-1.0 kg. m)
- Reinstall bolts and nuts attaching bracket to fender.
- Tightening torque: 9.4-15.9 ft. lbs (12.8-21.6 N.m, 1.3-2.2 kg. m)
NOTE: When installing the brake pipe lines on the HCU valve block, they must be located correctly in the valve block to ensure proper ABS operation. - Attach brake pipes to HECU, be careful to reattach the pipes in the same positions which they were in prior to removal.
- Tightening torque: 9.4-15.9 ft. lbs (12.8-21.6 N.m, 1.3-2.2 kg. m)
- Reconnect ECU harness connectors.
- Bleed the brakes.
- Road test vehicle to ensure proper operation of the base and ABS systems.