ELECTRIC PARKING BRAKE AUTOMATIC RELEASE FUNCTION DURING ACCELERATION OPERATION TOO EARLY/LATE ON SLOPE [ELECTRIC PARKING BRAKE]

id040328250700

Note

• If there is any vehicle malfunction complaint lodged by a customer, perform FOREWORD [ELECTRIC PARKING BRAKE] malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [ELECTRIC PARKING BRAKE].)

Description

• Electric parking brake is released too early when the electric parking brake automatic release function during acceleration is operated on a slope.

• Electric parking brake is released too late when the electric parking brake automatic release function during acceleration is operated on a slope.

Possible Cause

• Electric parking brake control module malfunction

Diagnostic Procedure

Step

Inspection

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 CMDTC self-test using the M-MDS.
(See DTC INSPECTION [ELECTRIC PARKING BRAKE].)

•  Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [ELECTRIC PARKING BRAKE].)

No

Go to the next step.

2

VERIFY IF THE ELECTRIC PARKING BRAKE WARNING LIGHT IS TURNED ON

•  Verify if the electric parking brake warning light is turned on.

•  Is the electric parking brake warning light turned on?

Yes

Perform an inspection referring to “ELECTRIC PARKING BRAKE WARNING LIGHT TURNS ON”.

(See ELECTRIC PARKING BRAKE WARNING LIGHT TURNS ON [ELECTRIC PARKING BRAKE].)

No

Replace the electric parking brake control module.

(See ELECTRIC PARKING BRAKE CONTROL MODULE REMOVAL/INSTALLATION.)

Step	Inspection		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 CMDTC self-test using the M-MDS. (See DTC INSPECTION [ELECTRIC PARKING BRAKE].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [ELECTRIC PARKING BRAKE].)
1		No	Go to the next step.
2	VERIFY IF THE ELECTRIC PARKING BRAKE WARNING LIGHT IS TURNED ON • Verify if the electric parking brake warning light is turned on. • Is the electric parking brake warning light turned on?	Yes	Perform an inspection referring to “ELECTRIC PARKING BRAKE WARNING LIGHT TURNS ON”. (See ELECTRIC PARKING BRAKE WARNING LIGHT TURNS ON [ELECTRIC PARKING BRAKE].)
2		No	Replace the electric parking brake control module. (See ELECTRIC PARKING BRAKE CONTROL MODULE REMOVAL/INSTALLATION.)