Key Switch (Intelligent Key Unit Input) Check

INTELLIGENT KEY SYSTEM


Key Switch (Intelligent Key Unit Input) Check

1.CHECK KEY SWITCH
With CONSULT-III
Check key switch ("KEY SW") in "DATA MONITOR" mode with CONSULT-III.





Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit harness connector.





3. Check voltage between Intelligent Key unit harness connector
M42 terminal 7 and ground.





OK or NG
OK - Key switch is OK.
NG - GO TO 2.
2.CHECK KEY SWITCH POWER SUPPLY CIRCUIT
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and ignition knob switch connector.
3. 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 3.
NG - Repair or replace key switch and ignition knob switch power supply circuit.
3.CHECK KEY SWITCH OPERATION





Check continuity between key switch and ignition knob switch terminals 1 and 2.





OK or NG
OK - GO TO 4.
NG - Replace key cylinder assembly (built-in key switch).
4.CHECK KEY SWITCH CIRCUIT
1. Check continuity between Intelligent Key unit harness connector M42 (A) terminal 7 and key switch and ignition knob switch harness connector M49 (B) terminal 1.

7 - 1 : Continuity should exist.






2. Check continuity between Intelligent Key unit harness connector
M42 (A) terminal 7 and ground.

7 - Ground : Continuity should not exist.

OK or NG
OK - Check the condition of harness and harness connector.
NG - Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.