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 ASC 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
Brake warning lamp does not illuminate when the ignition switch is turned to "ON" position (engine stopped).
 4
ABS warning lamp stays ON after the engine is started.
 5
ASC indicator lamp stays ON after the engine is started.
 6
ASC OFF indicator lamp stays ON after the engine is started.
 7
The ASC system cannot be disabled when ASC OFF switch is pressed 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/ASC/TCL operates too frequently.
 12
ESS inoperative or improper operative.
 13
HSA does not work.
 14
HSA works on a flat road.
 15
The initial check sound of hydraulic unit is loud.
 16