ELECTRIC PARKING BRAKE CANNOT BE RELEASED [ELECTRIC PARKING BRAKE (US)]
ELECTRIC PARKING BRAKE CANNOT BE RELEASED [ELECTRIC PARKING BRAKE (US)]
SM2565952
id040328250834
-
Note
-
• If it is necessary to move the vehicle as in an emergency, perform the electric parking brake forced release. (See ELECTRIC PARKING BRAKE FORCED RELEASE PROCEDURE.)
|
Troubleshooting item |
Electric parking brake cannot be released |
|
|---|---|---|
|
Description
|
• The electric parking brake cannot be released even though the electric parking brake release operation has been performed.
|
|
|
Possible cause
|
• Electric parking brake operation malfunction (if there is a malfunction in electric parking brake, DSC HU/CM detects DTC)
• Rear brake sticking (rear disc plate is retained even though electric parking brake motor gear unit operates release)
|
|
|
System Wiring Diagram
|
• Not applicable
|
|
Diagnostic Procedure
|
Step |
Inspection |
Results |
Action |
|---|---|---|---|
|
1
|
VERIFY ALL SYSTEM DTCs
• Switch the ignition off.
• Switch the ignition ON (engine off or on) and wait for 10 s or more.
• Perform a DTC inspection using the M-MDS. (See DTC INSPECTION.)
• Are any DTCs displayed?
|
Yes
|
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [DSC HU/CM (US)].)
|
|
No
|
Inspect the rear braking for sticking and repair or replace the malfunctioning location.
Perform the repair completion verification.
|
||
|
Repair completion verification
|
VERIFY THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Has the malfunction symptom been eliminated?
|
Yes
|
Complete the symptom troubleshooting.
Explain to the customer what has been repaired.
|
|
No
|
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.
|