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ABS DIAGNOSIS TSB Revision ANTI-LOCK BRAKING SYSTEM (ABS) 35B-149 SYMPTOM CHART M1352011401582 CAUTION • ABS may operate in the following conditions without hard braking: Slippery road surface, high-speed turn, and bumpy road surface. When asking the customers, confirm that they • During ABS operation, the brake pedal is pulled forward gradually, and noise occurs at the same time. This is because the brake line pressure varies intermittently to prevent the wheel lock, and • During diagnosis, a diagnostic trouble code associated with other system may be set when the ignition switch is turned on with connector(s) disconnected. On completion, check all systems for Symptoms Inspection Reference Scan tool cannot communicate only with ABS-ECU. 1 Brake warning light stays ON with the parking brake lever released. 2 ABS warning light does not illuminate when ignition switch is turned to the ON 3 Brake warning light does not illuminate when the ignition switch is turned to 4 ABS warning light stays ON after the engine is started. 5 Abnormality in brake operation 6 ABS system inoperative 7 ABS-ECU power supply circuit system 8 ABS operate too frequently. 9 The initial check sound of hydraulic unit is loud. 10 |