Key Switch (BCM Input) Check
- CHECK KEY SWITCH POWER SUPPLY CIRCUIT
- Remove mechanical key from ignition switch.
- Disconnect key switch and ignition knob switch connector.
- Check voltage between key switch and ignition knob switch harness connector M49 terminal 2 and ground.
2 - Ground : Battery voltage.
OK or NG
OK: GO TO 2.
NG: Check harness between key switch and ignition knob switch and fuse.
- CHECK KEY SWITCH
Check continuity between key switch and ignition knob switch terminals 1 and 2.
CONNECTOR TERMINAL CONTINUITY SPECIFICATIONComponent Terminals Condition Continuity Ignition switch 1 2 Insert mechanical key into ignition switch. Yes Remove mechanical key from ignition switch. No OK or NG
OK: GO TO 3.
NG: Replace key cylinder assembly (built-in key switch).
- CHECK KEY SWITCH SIGNAL CIRCUIT
- Disconnect BCM connector.
- Check continuity between BCM harness connector M18 (A) terminal 37 and key switch and ignition knob switch harness connector M49 (B) terminal 1.
37 - 1 : Continuity should exist.
- Check continuity between BCM harness connector M18 (A) terminal 37 and ground.
37 - Ground : Continuity should not exist.
OK or NG
OK: Key switch (BCM input) circuit is OK.
NG: Repair or replace harness between key switch and ignition knob switch and BCM.