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.
  • 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 electric moter 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.
 M.U.T.-III cannot communicate with all systems.
 -
 Refer to GROUP 54C - Troubleshooting/CAN Bus Diagnostics Table .
M.U.T.-III cannot communicate only with ASC-ECU.
 1
ASC OFF indicator lamp flashes at a rate of 2Hz.
 2
Brake warning lamp does not illuminate when the electric motor switch is turned to ON position.
 3
ABS warning lamp does not illuminate when the electric motor switch is turned to the ON position.
 4
ABS warning lamp stays ON after the electric motor unit is started.
 5
ASC warning lamp stays ON after the electric motor unit is started.
 6
ASC OFF indicator lamp stays ON after the electric motor unit is started.
 7
The TCL/ASC system cannot be disabled when ASC OFF switch is pressed for 3 seconds or more to turn the system OFF.
 8
Abnormality in brake operation.
 9
TCL/ASC does not operate.
 10
ASC-ECU power supply circuit system
 11
ABS/TCL/ASC operates too frequently.
 12