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DTC U1191: No Receive IGCT Fault Detect SIG
 
 
 
 
TROUBLE JUDGMENT
Check Condition
  • The power supply mode of the electric motor switch is ON, or the main drive lithium-ion battery starts to be charged.
Judgment Criterion
  • The failure detection control signal cannot be received.
 
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Not applicable
 
 
PROBABLE CAUSES
  • The CAN bus is failed.
  • The PHEV-ECU is failed.
  • The on board charger/DC-DC converter is failed.
 
 
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose CAN bus line.
  • Diagnose CAN bus line.
Is the CAN bus line normal?
Go to Step 2.
Repair CAN bus line (Refer to GROUP 54C - Troubleshooting - CAN Bus Diagnostics Table ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the other system DTC is set.
Is the DTC related to PHEV-ECU system set?
Check PHEV-ECU system (Refer to GROUP 54Da - PHEV-ECU - Diagnostic Trouble Code Chart ).
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-III), read the other system diagnostic trouble code (DTC).
Check whether the other ECU performing CAN communication with PHEV-ECU set DTC U1191 (Refer to GROUP 54C - CAN Communication-related Diagnosis Code (U-code) Table ).
Is the DTC set?
Replace the PHEV-ECU (Refer to GROUP 54Da - PHEV-ECU ).
Go to Step 4.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set.
Is the DTC set?
Replace the on board charger/DC-DC converter (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).