Hill Descent Control Switch

Hill descent control SWITCH

Description

The hill descent control switch activates (turn ON) the hill descent control function when the hill descent control switch is pressed.


Component Function Check


1. CHECK HILL DESCENT CONTROL SWITCH OPERATION

Turn ON/OFF the hill descent control switch and check that the hill descent control indicator lamp in the combination meter turns ON/OFF correctly.





Is the inspection result normal?
YES- Inspection End
NO- Go to diagnosis procedure. .


Diagnosis Procedure

Regarding Wiring Diagram information, With Hill Descent Control/Hill Start Assist.

1. CHECK HILL DESCENT CONTROL SWITCH

Perform the hill descent control switch component inspection. .
Is the inspection result normal?
YES- GO TO 2
NO- Replace hill descent control switch.

2. CHECK HILL DESCENT CONTROL SWITCH HARNESS






1.Disconnect ABS actuator and electric unit (control unit) connector.
2.Check continuity between ABS actuator and electric unit (control unit) connector E127 (A) terminal 25 and hill descent control switch connector M155 (B) terminal 2.





3.Check continuity between ABS actuator and electric unit (control unit) connector E127 (A) terminal 25 and ground.





Is the inspection result normal?
YES- GO TO 3
NO- Repair or replace harness.

3. CHECK HILL DESCENT CONTROL SWITCH GROUND






Check continuity between hill descent control switch connector
M155 terminal 1 and ground.





Is the inspection result normal?
YES- GO TO 4
NO- Repair or replace harness.

4. CHECK COMBINATION METER

Check if the indication and operation of combination meter are normal. Reading and Clearing Diagnostic Trouble Codes.
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). Type 2.
NO- Replace combination meter. Service and Repair.


Component Inspection


1. CHECK HILL DESCENT CONTROL SWITCH






1.Turn ignition switch OFF.
2.Disconnect hill descent control switch connector.
3.Check continuity between hill descent control switch terminals.





Is the inspection result normal?
YES- Inspection End
NO- Replace hill descent control switch.


Special Repair Requirement


1. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator and electric unit (control unit). Type 1.
- GO TO 2

2. CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Type 1.
- END