[Previous][Next]
DTC C1521 Motor rotation angle sensor failure 1
DTC C1522 Motor rotation angle sensor failure 2
 
 
cautionWhenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
Power is supplied to the motor rotating angle sensor from the EPS-ECU.
 
 
 
FUNCTION
The EPS-ECU receives information on the motor rotation angle from the motor rotation angle sensor. When judging that the information is abnormal, sets these DTCs.
 
 
 
TROUBLE JUDGMENT
Check Conditions
  • Turn the ignition switch to the "ON" position (Engine running).
Judgment Criterion
  • The motor rotating angle sensor output voltage does not meet a predetermined voltage stored in the microcomputer.
Fail Safe, Back Up Function
  • The EPS-ECU limits or stops the motor control and illuminates the electric power steering warning light, then sets DTC C1521 and C1522.
 
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the EPS-ECU
 
 
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position (Engine running).
(4) Check if the DTC is set.
Is the DTC set?
Replace the EPS-ECU (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).