The AVH(Auto Vihicle Hold) is a convenience and comfort function which prevents vehicle from rolling away when depressing the brake pedal with 'D' positon in gear after standing still untill pressing an accelerator pedal.
It is operated via HECU. The HECU maintains the state of standing still with holding last applied braking pressure even though the driver depresses the brake pedal.
The HECU exchanges CAN messages with cluster, EPB ECU for normal operation of the AVH. (If the HECU receives the door open message from cluster, it prohibits the AVH operation)
The HECU monitors CAN messages for a normal operation and if the invalid messages from EPB ECU are detected, this DTC is set.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
CAN message monitoring | 1. A fault in the EPB system side 2. Poor connection of CAN communication circuit |
Enable Conditions |
•
When an invalid message from EPB ECU is detected | |
Fail Safe |
•
The AVH(Automatic Vehicle Hold) function is inhibited |
