Check Key Switch (Intelligent Key Unit Input)

With CONSULT-II 

Display "KEY SW" on DATA MONITOR screen, and check if ON-OFF display is linked to insertion of mechanical key in ignition knob.

When key is inserted in ignition knob : ON 

When key is removed in ignition knob : OFF 

Fig 1: Identifying CONSULT-II Display - Data Monitor

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OK or NG 

OK: Key switch is OK.

NG: GO TO 2.

1. Remove mechanical key from ignition knob.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch connector M22 terminal 3 (L/R) and ground.

   3 (L/R) - Ground : Battery voltage 

   Fig 2: Identifying Voltage Between Key Switch And Ignition Knob Switch Connector M22 Terminal 3 (L/R) And Ground

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OK or NG 

OK: GO TO 3.

NG: Repair or replace key switch power supply circuit.

Check continuity between key switch and ignition knob switch terminals 3 and 4.

Fig 3: Identifying Continuity Between Key Switch And Ignition Knob Switch Connector Terminals 3 And 4

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OK or NG 

OK: GO TO 4.

NG: Replace key switch.

1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector M34 terminal 7 (B/W) and key switch and ignition knob switch connector M22 terminal 4 (B/W).

   7 (B/W) - 4 (B/W) : Continuity should exist. 

3. Check continuity between key switch and ignition knob switch connector M22 terminal 4 (B/W) and ground.

   4 (B/W) - Ground : Continuity should not exist. 

   Fig 4: Checking Key Switch Circuit

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OK or NG 

OK: Replace Intelligent key unit.

NG: Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.