Anti-lock Braking System(ABS) 16 3. REPAIRS : Precautions: Before undertaking any electric arc welding work, disconnect the ABS ECU's connector. During paintwork operations or major repair work, which are likely to subjected to higher temperature (above 85° C), The HCU must be removed. Before removing the ECU, the battery must be disconnected. Terminals must be fully tightened while installing battery. 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 Removal: 1. Turn OFF the ignition switch. 2. Remove the middle leaf screen cover. 3. Disconnect the battery cables and remove the battery. 4. Remove the mounting bolts and take out the battery tray.
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