DTC U0401:68 [BCM]
id0902f5413600
|
DESCRIPTION |
Error signal from PCM |
|---|---|
|
DETECTION CONDITION
|
• BCM receives the error signal from PCM for 5 s or more, while the ignition is ON.
|
|
POSSIBLE CAUSE
|
• PCM DTC is stored.
• PCM malfunction
• BCM malfunction
|
Diagnostic Procedure
|
STEP |
INSPECTION |
ACTION |
|
|---|---|---|---|
|
1
|
CONFIRM BCM DTC
• Clear the DTC using the M-MDS.
(See CLEARING DTC [BCM].)
• Switch the ignition to ON and wait for 5 s or more.
• Perform the BCM DTC inspection using the M-MDS.
(See DTC INSPECTION [BCM].)
• Is the same DTC present?
|
Yes
|
Go to the next step.
|
|
No
|
Go to Step 5.
|
||
|
2
|
CONFIRM 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 [MZR 1.5, MZR 1.6].)
(See DTC TABLE [MZR 2.0, MZR 2.5].)
(See DTC TABLE [MZ-CD 1.6].)
(See DTC TABLE [MZR-CD 2.2].)
(See DTC TABLE [SKYACTIV-G 2.0].)
|
|
No
|
Go to the next step.
|
||
|
3
|
PERFORM DTC INSPECTION AND VERIFY THAT MALFUNCTIONING PART IS PCM
• Clear the DTC using the M-MDS.
(See CLEARING DTC [BCM].)
• Switch the ignition to ON and wait for 5 s or more.
• Perform the BCM DTC inspection using the M-MDS.
(See DTC INSPECTION [BCM].)
• Is the same DTC present?
|
Yes
|
Replace the PCM, then go to the next step.
|
|
No
|
Go to Step 5.
|
||
|
4
|
VERIFY TROUBLESHOOTING COMPLETED
• Clear the DTC using the M-MDS.
(See CLEARING DTC [BCM].)
• Switch the ignition to ON and wait for 5 s or more.
• Perform the BCM DTC inspection using the M-MDS.
(See DTC INSPECTION [BCM].)
• Is the same DTC present?
|
Yes
|
Replace the BCM, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
5
|
VERIFY THAT NO OTHER DTCs ARE PRESENT
• Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
|
|
No
|
DTC troubleshooting completed.
|
||