General Description

The EPB system is the shorten word of Electric Parking Brake system. This system is the parking brake device which is used instead of the conventional hand-break system. When a driver presses the EPB button, the button signal is delivered to the EPB ECU and then the EPB actuator which consists of a motor and a gears is activated. At this time, while the motor in the EPB actuator rotates, the motor pulls the EPB cable connected to the rear wheels. The HECU exchanges signals with the EPB ECU for a normal control through CAN communication.

Driver can inhibit the AVH control by AVH switch.

When switch signal sends into the HECU, the AVH control is stopped and if the next switch signal is inputted again, the AVH control is ready.

DTC Description

This DTC is set when the condition that the level of AVH switch is high is continued for more than 60 seconds.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•

Circuit monitoring

1.

Open or short AVH switch

2.

Faulty AVH switch

Enable Conditions

•

When the AVH switch is ON for 1 minute.

Fail-Safe

•

The AVH(Automatic Vehicle Hold) function is inhibited

Diagnostic Circuit Diagram
note
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