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Inspection Procedure 3: The electric parking brake is not applied or released when the electric parking brake switch is operated.
 
 
 
 
OPERATION
  • When you pull up the electric parking brake switch with the vehicle stationary, the parking brake will be applied (locked).
  • When you turn ON the ignition switch, and press the electric parking brake switch with the brake pedal depressed, the parking brake will be released.
  • The electric parking brake cannot be applied or released manually when any of the conditions below is satisfied. When you operate the electric parking brake switch with any of the conditions satisfied, the electric parking brake warning light and the electric parking brake switch indicator will flash.
    • The system does not apply the parking brake if any of the conditions below is satisfied:
    • Power supply to the ECU fails (8 volts or less, or 18 volts or more)
    • The system enters the electric motor overheat protection mode.
    The system does not release the parking brake if any of the conditions below is satisfied:
    • Power supply to the ECU fails (8 volts or less, or 18 volts or more)
    • Turn the ignition switch to the LOCK (OFF) position.
    • The selector lever is not at P range with the brake pedal not depressed.
 
 
COMMENTS ON TROUBLE SYMPTOM
This trouble symptom assumes that scan tool (M.U.T.-IIISE) CAN bus diagnosis result is OK and no DTC is set.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the electric parking brake switch
  • Malfunction of the electric parking brake ECU
 
 
DIAGNOSIS
STEP 1. Check the electric parking brake switch.
Check the electric parking brake switch (Refer to ).
Is the check result normal?
Go to Step 2.
Replace the electric parking brake switch (Refer to ).
 
STEP 2. Retest the system
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the electric parking brake ECU (Refer to ).