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DTC U1199 VIN not programmed
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
VIN is written in the EPS-ECU.
 
 
 
TROUBLE JUDGMENT
Check Conditions
  • Turn the ignition switch to the "ON" position.
Judgment Criterion
  • When VIN is not written to EPS-ECU
Fail Safe, Back Up Function
  • The EPS-ECU sets DTC U1199.
 
 
 
TROUBLESHOOTING HINTS
  • Malfunction of CAN bus line
  • VIN not programmed
  • Malfunction of the EPS-ECU
 
 
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
Diagnose the CAN bus line.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - CAN-Related Diagnosis Code Table ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
Using scan tool (M.U.T.-IIISE) to check that DTC is set in the ECM. Check if the DTC is set.
Is the DTC set?
Perform troubleshooting for ECM (Refer to GROUP 13A - Diagnostic Trouble Code Chart ).
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position (Engine running).
Is the DTC set?
Replace the EPS motor (EPS-ECU). (Refer to ).
This diagnosis is complete.