Symptom Chart
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 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 diagnostic trouble code associated with other system may be set when the ignition switch is turned on with connector (s) disconnected. On completion, confirm all systems for diagnostic trouble code(s). If diagnostic trouble code(s) are set, erase them all.
SYMPTOM CHART
| Symptoms | Inspection procedure |
|---|---|
| M.U.T.-III cannot communicate only with ASC-ECU. | 1 |
| ASC OFF indicator light flashes at a rate of 2Hz. | 2 |
| Brake warning light stays ON with the parking brake lever released. | 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 | 6 |
| ASC indicator light stays ON | 7 |
| ASC-OFF indicator light stays ON after the engine is started. | 8 |
| After ASC switch is turned OFF, TCL/ASC system cannot be disabled. | 9 |
| Abnormality in brake operation | 10 |
| Traction control function or skid control function inoperative | 11 |
| ASC-ECU power supply circuit system | 12 |