DTC U0401:00 [ELECTRIC POWER STEERING (EPS)]

id0602a1812200

DTC U0401:00
Signal error from PCM
DETECTION CONDITION
•  Error detected in signal from PCM via CAN communication
FAIL-SAFE FUNCTION
•  Vehicle speed signal malfunction
―  Control is maintained by gradually changing the controlled vehicle speed and setting it to 100 km/h {62.1 mph}
―  Power steering malfunction indicator light: Illuminated
•  Engine speed signal malfunction
―  Control enabled
―  Power steering malfunction indicator light: Not illuminated
POSSIBLE CAUSE
•  PCM malfunction
SYSTEM WIRING DIAGRAM
Not applicable


Diagnostic Procedure

Step

Inspection

Action
1
INSPECT FOR PCM MALFUNCTION
•  Using the M-MDS, perform the DTC inspection for the PCM.
•  Are any DTCs detected?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [PCM (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].)
(See DTC TABLE [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].)
(See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
DTC troubleshooting completed, then go to the next step.
No
Go to the next step.
2
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Clear the DTC from the memory.
•  Is the same DTC present?
Yes
Replace the PCM.
(See PCM REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See PCM REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
DTC troubleshooting completed.