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.

1. When key is inserted in ignition knob : ON 
2. When key is removed in ignition knob : OFF 

OK or NG 

1. OK : Key switch is OK.
2. NG : GO TO 2.

Fig 1: Displaying "KEY SW" on DATA MONITOR Screen

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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.
   1. 3 (L/R) - Ground : Battery voltage 

   OK or NG 

   1. OK : GO TO 3.
   2. NG : Repair or replace key switch power supply circuit.

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

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

Fig 3: Connector Terminal Reference Chart

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OK or NG 

1. OK : GO TO 4.
2. NG : Replace key switch.

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

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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).
   1. 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.
   1. 4 (B/W) - Ground : Continuity should not exist. 

OK or NG 

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

Fig 5: Checking Key Switch Circuit

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