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DTC C1558 Invalid Data Received of Wheel speed information
 
 
cautionWhenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
EPS-ECU receives wheel speed information from the ASC-ECU.
 
 
 
FUNCTION
Based on the wheel speed information the EPS-ECU receives, the EPS-ECU performs the control to improve the steering wheel return.
 
 
 
TROUBLE JUDGMENT
Check Conditions
  • Turn the ignition switch to the "ON" position (Engine running).
Judgment Criterion
  • When abnormal wheel speed information is received from the ASC-ECU.
Fail Safe, Back Up Function
  • The EPS-ECU sets DTC C1558.
  • Aggravated feeling of steerage
 
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the ASC-ECU
  • Malfunction of the EPS-ECU
 
 
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
Use scan tool (M.U.T.-IIISE) to check if the wheel speed sensor related DTC is set in ASC-ECU (Refer to GROUP 35C - Troubleshooting ).
Check if the DTC is set.
Is the DTC set?
Perform troubleshooting for ASC-ECU (Refer to GROUP 35C - Troubleshooting ).
Go to Step 2.
 
STEP 2. 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). Check if the DTC is set.
Is the DTC set?
Replace the EPS motor (EPS-ECU). (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).