ANTI LOCK BRAKING SYSTEM (ABS) 16 6.2.2 REPAIRS PRECAUTIONS 1. Before undertaking any electric arc welding work, disconnect the ABS ECU's connector. 2. During paintwork operations or major repair work, which are likely to subjected to higher temperature (above 85° C), The HCU must be removed. 3. Before removing the ECU, the battery must be disconnected. Terminals must be fully tightened while installing battery. 4. Electrical wiring should not to be repaired it should be replaced. !! WARNING When the hydraulic connections to the hydraulic modulator can be crossed over; the ECU selfdiagnosis will not detect it as a fault; nor will it cause the system to be shut down or cause a fault code to be logged in the ECU. When the hydraulic modulator is exchanged or repaired, the brake pipes to the solenoids must be tested for correct assignment using a diagnostics tester. When the inlet and outlet valve are activated, e.g. on the front left wheel, this must generate the necessary changes at the wheel. If this does not happen, the pipes have been crossed over. This will cause the system to function incorrectly. BRAKE SYSTEM BLEEDING NOTE For brake bleeding procedure conventional/ using diagnostic tool refer Brakes group. A. ABS ECU / HCU REMOVAL 1. Turn OFF the ignition switch and disconnect battery. 2. Disconnect ABS ECU/HCU wiring harness connector (1) (Refer the procedure given in the note below). NOTE Refer steps (i) and (ii) to disconnect ABS ECU /HCU connector. (i) Press the unlock button and remove the lever from the lock and move towards unlocking position.
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