STEP 1. Scan tool MB991958 CAN bus diagnostics
STEP 2. Scan tool MB991958 data list
STEP 3. Scan tool MB991958 DTC of other systems
STEP 4. Scan tool MB991958 DTC of other systems
STEP 5. Check whether the DTC is set again.
STEP 6. Check whether the DTC is set again.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Depress the throttle pedal fully.
(4) Check if the DTC is set.
Is DTC U0401 set?
Replace AWD-ECU (Refer to ). Then go to Step 7 . A poor connection, open circuit or other intermittent malfunction between the engine control module and the accelerator pedal position sensor, or between the engine control module and the crank angle sensor is suspected (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunction ).
STEP 7. Check whether the DTC is set again.