DTC U2000:4B [ELECTRONICALLY CONTROLLED BRAKE UNIT]
id0402c6011900
Outline
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System malfunction location |
Abnormal electric parking brake motor gear unit temperature |
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Detection condition
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• The electronically controlled brake unit determines that the temperature of the electric parking brake motor gear unit is high due to repeated operation of the electric parking brake for a short period.
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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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• The electric parking brake was operated repeatedly for a short period.
• Electronically controlled brake unit 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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VERIFY IF ELECTRIC PARKING BRAKE MOTOR GEAR UNIT TEMPERATURE WAS TEMPORARILY HIGH
• Press down the electric parking brake switch, release the electric parking brake, and leave the vehicle for 30 min or more.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Perform the following procedure 3 times or more.
• 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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Go to the next step.
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No
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System is normal. (Explain to the customer that the protection control was performed by repeatedly operating the electric parking brake.)
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Repair completion verification 1
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VERIFY THAT VEHICLE IS REPAIRED
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Perform the following procedure 3 times or more.
• 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 electronically controlled brake unit, 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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