The DBC function is the shorten word of Downhill Brake Control function. When a vehicle goes down the hill, just pushing the DBC switch enables the car to keep its vehicle's speed at a constant value without operating the brake pedal. The DBC function is operated when the vehicle is on the decline and its velocity is under the predetermined speed.
This DTC is set if the DBC switch has a short circuit and the DBC function is inhibited.
Item
Detecting Condition
Possible cause
DTC Strategy
Monitoring DBC switch circuit
Short in the DBC switch circuit
Faulty DBC switch
Enable Conditions
When the HECU detects a continuous signal of DBC switch pressed more than 1 minute
Fail Safe
Inhibit the DBC function and allow the ABS/EBD/ESP control.
The DBC warning lamp is activated.
Engine ON
DBC Switch "HIGH"
DBC Switch "LOW"
7.0V ~ 16.0V
0V ~ 3.0V