Component Inspection

IG "OFF".
IG "ON".
Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
Using a GDS, Clear DTC.
Select "Diagnostic Trouble Codes(DTCs)" mode again.
Are any DTCs present?
YES

Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NOTE:
In a case of replacing HECU, operate following functions
1. "Steering Angle Sensor Calibration" for steering angle sensor offset correction (refer to C1261 ) - ESC only
2. "Variant Coding" for option type setting (refer to C1702 ).
NO

Fault is intermittent caused by poor connection in CAN signal harness and/or HECU's connector. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.