Key Switch (Intelligent Key Unit Input)

KEY SWITCH (INTELLIGENT KEY UNIT INPUT)


Diagnosis Procedure

Regarding Wiring Diagram information, DLK.
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
M70 terminal 7 and ground.





Is the inspection result normal?
YES - Key switch is OK.
NO - 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 M12 terminal 3 and ground.

3 - Ground : Battery voltage






Is the inspection result normal?
YES - GO TO 3
NO - 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 3 and 4.





Is the inspection result normal?
YES - GO TO 4
NO - Replace key cylinder assembly (built-in key switch).
4.CHECK KEY SWITCH CIRCUIT
1. Check continuity between Intelligent Key unit harness connector (A) M70 terminal 7 and key switch and ignition knob switch harness connector (B) M12 terminal 4.

7 - 4 : Continuity should exist.






2. Check continuity between Intelligent Key unit harness connector
(A) M70 terminal 7 and ground.

7 - Ground : Continuity should not exist.

Is the inspection result normal?
YES - Check the condition of harness and harness connector.
NO - Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.