TROUBLE 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 diagnosis 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 diagnosis code(s). If diagnosis code(s) are set, erase them all.
Trouble symptom
Inspection procedure number
Reference page
M.U.T.-III communication with ABS system is impossible.
1

Brake warning lamp stays ON with the parking brake lever released (ABS warning lamp is OFF).
2

When the ignition switch is turned to the "ON" position (engine stopped), the ABS warning lamp does not illuminate.
3

ABS warning lamp stays ON after the engine is started.
4

ABS-ECU power supply circuit system.
5

Abnormality in brake operation.
6

ABS operates too frequently.
7

The initial check sound of hydraulic unit is loud.
8

ABS system inoperative
9