DTC U0401:68

id030200201200

DTC U0401:68
Abnormal message from PCM
DETECTION CONDITION
•  Correct data cannot be received from PCM
FAIL-SAFE FUNCTION
•  Gear position signal error (MTX)
―  4WD operates by the specified data.
•  Except for gear position signal error
―  Control disabled.
POSSIBLE CAUSE
•  PCM malfunction
•  4WD CM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT FOR PCM MALFUNCTION
•  Switch the ignition to off.
•  Using the M-MDS, perform the DTC inspection for the PCM.
•  Are any DTCs detected?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See DTC TABLE [SKYACTIV-D 2.2].)
No
Go to the next step.
2
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Clear the DTCs from the memory.
•  Are the same DTCs present?
Yes
Replace the 4WD CM.
(See 4WD CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
3
VERIFY THAT NO OTHER DTCS ARE PRESENT
•  Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See ELECTRONIC 4WD CONTROL SYSTEM ON-BOARD DIAGNOSIS.)
No
DTC troubleshooting completed.