Symptom Chart
CAUTION:
- ABS may operate in the following conditions without hard braking: Low mu road surface, high-speed turn, and bumpy road surface. When asking the customers, confirm that they have/have not encountered ABS operation in corresponding conditions.
- During ABS operation, the brake pedal is pulled forward gradually, and the noise occurs at the same time. This is because the brake line pressure varies intermittently to prevent the wheel lock, and not a system malfunction.
- During diagnosis, a DTC associated with other system may be set when the ignition switch is turned "ON" with connector(s) disconnected. On completion, confirm all systems for DTC(s). If DTC(s) are set, erase them all.
| Trouble symptom | Inspection procedure number | Reference |
|---|---|---|
| Scan tool (M.U.T.-III) communication with ASC system is impossible. | 1 | |
| Brake warning light stays ON with the parking brake lever released (ABS warning light is OFF). | 2 | |
| When the ignition switch is turned to the "ON" position (engine stopped), the ABS warning light does not illuminate. | 3 | |
| Brake warning light does not illuminate when the ignition switch is turned to "ON" position (engine stopped). | 4 | |
| ABS warning light stays ON after the engine is started. | 5 | |
| ASC indicator light stays ON after the engine is started. | 6 | |
| ASC-OFF indicator light stays ON after the engine is started. | 7 | |
| The stability control/TCL system cannot be disabled when ASC OFF switch is pressed for 3 seconds or more to turn the system OFF. | 8 | |
| Abnormality in brake operation. | 9 | |
| Abnormality in active stability control system operation. | 10 | |
| ASC-ECU power supply circuit system. | 11 | |
| ABS/stability control/TCL operates too frequently. | 12 | |
| HSA (Hill Start Assist) does not work. | 13 | |
| HSA (Hill Start Assist) works on a flat road. | 14 | |
| The initial check sound of hydraulic unit is loud. | 15 |