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.
SYMPTOM CHART
| Trouble symptom | Inspection procedure number | |
|---|---|---|
| Scan tool cannot communicate with the ABS/ASC system. | Scan tool cannot communicate with all systems. | Refer to CAN BUS DIAGNOSTICS TABLE . |
| Scan tool cannot communicate only with ASC-ECU. | 1 | |
| ASC OFF display flashes at a rate of 2Hz. | 2 | |
| Brake warning light stays ON with the parking brake lever released (ABS warning light is OFF). | 3 | |
| ABS warning light does not illuminate when ignition switch is turned to the ON position (Engine stopped). | 4 | |
| Brake warning light does not illuminate when the ignition switch is turned to ON position (Engine stopped). | 5 | |
| ABS warning light stays ON after the engine is started. | 6 | |
| ASC warning display stays ON after the engine is started. | 7 | |
| ASC OFF display or ASC OFF light stays ON after the engine is started. | 8 | |
| The skid control/TCL system cannot be disabled when ASC OFF switch is pressed for 3 seconds or more to turn the system OFF. | 9 | |
| Abnormality in brake operation | 10 | |
| Skid control/TCL does not work. | 11 | |
| ASC-ECU power supply circuit system | 12 | |
| ABS/skid control/TCL operates too frequently. | 13 | |