Ignition Switch And Key Unlock Warning Switch: Inspection

Inspect ignition switch continuity :

Fig 1: Identifying Ignition Switch Positions & Terminals
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Fig 2: Ignition Switch Position Specifications
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If continuity is not as specified, replace the switch.
Inspect key unlock warning switch continuity :

Fig 3: Identifying Key Unlock Warning Switch Positions & Terminals
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Fig 4: Key Unlock Warning Switch Specifications
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If continuity is not as specified, replace the switch.
Inspect key unlock warning system (inspect integration relay operation) :
1. Connect the positive (+) lead from the battery to terminal 3.
  
  Fig 5: Testing Key Unlock Warning/Integration Relay (1 Of 3)
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2. Connect the negative (-) lead from the battery to terminals 4, 7 and 8.
  
  Fig 6: Testing Key Unlock Warning/Integration Relay (2 Of 3)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the buzzer sounds.
4. Disconnect the negative (-) lead from the battery to terminal 8.
5. Check that the buzzer stops sounding.
6. Connect the negative (-) lead from the battery to terminal 8 and operate the buzzer sound again.
  
  Fig 7: Testing Key Unlock Warning/Integration Relay (1 Of 3)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Disconnect the negative (-) lead from the battery to terminal 4.
8. Check that the buzzer stops sounding. If operation is not as specified, replace the relay.
Inspect integration relay circuit :
1. Disconnect the connector from the integration relay and inspect the connectors on the wire harness side.
  
  Fig 8: Identifying Integration Relay Terminals (Wire Harness Side)
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  Fig 9: Integration Relay Terminal Specifications (Wire Harness Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the circuit is not as specified, inspect the circuits connected to other parts.
2. Remove the integration relay from the instrument panel junction block and inspect the connectors on the junction block side.
  
  Fig 10: Identifying Integration Relay Terminals (Junction Block Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 11: Integration Relay Terminal Specifications (Junction Block Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the circuit is as specified, try replacing the relay with a new one.
  
  If the circuit is not as specified, inspect the circuits connected to other parts.