DTC U0401:68 [ELECTRONICALLY CONTROLLED BRAKE UNIT]
id0402c6011300
Outline
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System malfunction location |
Error signal received from PCM |
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Detection condition
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• The electronically controlled brake unit receives the error signal from the PCM (CAN BUS No.1 or CAN BUS No.2).
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Fail-safe
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Refer to “DTC Table” and “Fail-safe Function Malfunction Contents Table”. (See DTC TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT].)
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Possible cause
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• DTCs are stored in the PCM.
• PCM malfunction.
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System wiring diagram
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Not applicable
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Connector diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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INSPECT PCM FOR MALFUNCTION
• Perform the DTC inspection for PCM.
(See DTC INSPECTION.)
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-X)].)
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No
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Go to the next step.
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Repair completion verification 1
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Perform the DTC inspection for the electronically controlled brake unit.
(See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the PCM, then go to the next step.
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No
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Go to the next step.
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Repair completion verification 2
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VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection.
(See DTC INSPECTION.)
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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