Key Switch

KEY SWITCH

Description

Key switch detects that mechanical key is inserted into the key cylinder, and then transmits the signal to BCM .


Component Function Check


1. CHECK KEY SWITCH INPUT SIGNAL

Check key switch ("KEY ON SW") in "Data Monitor" mode with CONSULT. Refer to "DOOR LOCK : CONSULT Function (BCM DOOR LOCK)" With Intelligent Key System.





Is the inspection result normal?
YES- Key switch is OK.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK KEY SWITCH POWER SUPPLY CIRCUIT

1.Remove mechanical key from key cylinder.
2.Disconnect key switch connector.
3.Check voltage between ignition knob switch, key switch and key lock solenoid harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace harness.

2. CHECK KEY SWITCH SIGNAL CIRCUIT

1.Check continuity between BCM harness connector and ignition knob switch, key switch and key lock solenoid connector.





2.Check continuity between key switch and ground.





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

3. CHECK KEY SWITCH

Check key switch function.
Refer to "Component Inspection" .
Is the inspection result normal?
yes- GO TO 4.
NO- Replace ignition knob switch, key switch and key lock solenoid.

4. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK KEY SWITCH

1.Turn ignition switch OFF.
2.Disconnect key switch connector.
3.Check continuity between ignition knob switch, key switch and key lock solenoid terminals.





Is the inspection result normal?
YES- Key switch is OK.
NO- Replace ignition knob switch, key switch and key lock solenoid.