TROUBLE SYMPTOM CHART


caution
  • ABS may operate in the following conditions without hard braking: Low µ road surface, high-speed turn, and bumpy road surface. When asking the customers, confirm if they have encountered ABS operation in corresponding conditions.
  • Even when the ASC operation display does not appear, the ASC operation noise (pump, motor, and others) may be generated. This occurs because the pump, motor, and others operate to accumulate the braking force before the application of braking force to wheels, and it is not a malfunction.
  • During ABS operation, as the brake pedal is gradually drawn inward, the noise is generated. This occurs because the brake line pressure varies intermittently to prevent the wheel lock, and it is not a 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 symptoms
 Inspection procedure number
 Reference page
The M.U.T.-III cannot communicate with the TCL/ASC system.
 The M.U.T.-III cannot communicate with all systems.
 -
 Refer to GROUP 54C - Troubleshooting .
The M.U.T.-III cannot communicate only with TCL/ASC-ECU.
 1
TCL/ASC-ECU power supply system
 2
The brake warning lamp does not illuminate when ignition switch is turned to the ON position (engine stopped).
 3
The ABS warning lamp does not illuminate when ignition switch is turned to the ON position (engine stopped).
 4
The ABS warning lamp and TCL/ASC indicator lamp remains illuminated even after the engine is started.
 5
Abnormality in brake operation
 6
TCL/ASC does not operate.
 7
TCL/ASC-ECU power supply circuit system
 8
ABS/TCL/ASC operates too frequently.
 9
ESS inoperative or improper operative.
 10