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DTC U0401:00 [TCM (ET6A-EL, ET6AX-EL) (E)]

DTC U0401:00 [TCM (ET6A-EL, ET6AX-EL) (E)]

 id0502q93005r2

Outline

System malfunction location

Error data received from PCM (HS_CAN or local CAN between TCM and PCM)
Detection condition
•  Under the following condition, the TCM receives an error signal from the PCM (HS_CAN or local CAN between TCM and PCM) for a continuous 0.5 s.
―  Battery voltage is 10 V or more.
Fail-safe
•  Set to TCC control.
•  Inhibits learning control.
•  Inhibits manual mode.
•  Inhibits neutral idle control.
•  Inhibits i-stop control.
•  Inhibits 5GR and 6GR.
•  Inhibits shift down when the accelerator pedal is depressed.
Possible cause
•  PCM DTC is stored.
System wiring diagram
•  Not applicable
Connector diagram
•  Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action
1
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
•  Record the freeze frame data/snapshot data.
Note
•  Recording can be facilitated using the screen capture of the PC function.
—
Go to the next step.
2
VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
•  Verify related Service Bulletins, on-line repair information, or Service Information availability.
•  Is any related information available?
Yes
Perform repair or diagnosis according to the available information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY PCM DTC
•  Perform the PCM DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G (E))].)
(See DTC TABLE [PCM (SKYACTIV-D)].)
(See DTC TABLE [PCM (SKYACTIV-X)].)
No
Go to the next step.
Repair completion verification
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Clear the DTC using the M-MDS.
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Start the engine and warm it up completely.
2.  Drive the vehicle for a while under the following conditions:
•  Selector lever position: D position
•  Perform the DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (E)].)
No
DTC troubleshooting completed.