DTC U0401:68 [ELECTRONIC 4WD CONTROL SYSTEM]

id0302a6201200

DTC U0401:68
Signal error from PCM
DETECTION CONDITION
•  Correct data cannot be received from PCM
FAIL-SAFE FUNCTION
•  Refer to “Fail-safe function table”. (See DTC TABLE [ELECTRONIC 4WD CONTROL SYSTEM].)
POSSIBLE CAUSE
•  PCM malfunction
•  4WD control module malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
VERIFY PCM DTC
•  Using the M-MDS, perform the PCM DTC inspection.
•  Are any DTCs present?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
DTC troubleshooting completed, then go to the next step.
No
Go to the next step.
2
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Using the M-MDS, clear the DTC from the 4WD control module.
•  Using the M-MDS, perform the 4WD control module DTC inspection.
•  Is the same DTC present?
Yes
Replace the 4WD control module, then go to the next step.
(See 4WD CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
3
VERIFY NO DTC IS PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [ELECTRONIC 4WD CONTROL SYSTEM].)
No
DTC troubleshooting completed.