Ignition Switch & Key Unlock Warning Switch: Inspection

1. INSPECT IGNITION SWITCH CONTINUITY 
   Fig 1: Identifying Ignition Switch And Terminals

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   INSPECTING IGNITION SWITCH CONTINUITY
   
   

   Switch Position	Tester Connection	Specified Condition
   LOCK	-	No Continuity
   ACC	2 - 3	Continuity
   ON	2 - 3 - 4 6 - 7	Continuity
   START	1 - 2 - 4 6 - 7 - 8	Continuity

   If continuity is not as specified, replace the switch.

2. INSPECT KEY UNLOCK WARNING SWITCH CONTINUITY 
   Fig 2: Identifying Key Unlock Warning Switch And Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   INSPECTING KEY UNLOCK WARNING SWITCH CONTINUITY
   
   

   Switch Position	Tester Connection	Specified Condition
   OFF (Key Removed)	-	No Continuity
   ON (Key Set)	1 - 2	Continuity

   If continuity is not as specified, replace the switch.

3. Key unlock warning system: 

   INSPECT INTEGRATION RELAY OPERATION 

   1. Connect the positive (+) lead from the battery to terminal 1.
   Fig 3: Checking Integration Relay Operation (Buzzer Sounds)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Connect the negative (-) lead from the battery to terminals 5, 6 and 10.
   3. Check that the buzzer sounds.
   4. Disconnect the negative (-) lead from the battery to terminal 6.
   Fig 4: Checking Integration Relay Operation (Buzzer Stops)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Check that the buzzer stops sounding.
   6. Connect the negative (-) lead from the battery to terminal 6.
      Fig 5: Checking Integration Relay Operation (Buzzer Stops)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Disconnect the negative (-) lead from the battery to terminal 5.
   8. Check that the buzzer stops sounding.

   If operation is not as specified, replace the relay.

4. INSPECT INTEGRATION RELAY CIRCUIT 
   1. Remove the relay from the junction block No. 1 and inspect the connector on the junction block side.
      Fig 6: Inspecting Integration Relay Circuit Terminal

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      SPECIFIED CONDITION
      
      

      Tester connection	Condition	Specified condition
      4 - Ground	Passenger's door courtesy switch OFF (Door closed)	No continuity
      4 - Ground	Passenger's door courtesy switch ON (Door opened)	Continuity
      5 - Ground	Key unlock warning switch OFF	No continuity
      5 - Ground	Key unlock warning switch ON	Continuity
      6 - Ground	Driver's door courtesy switch OFF (Door closed)	No continuity
      6 - Ground	Driver's door courtesy switch ON (Door opened)	Continuity
      8 - Ground	Driver's buckle switch ON (Seat belt unfastened)	Continuity
      8 - Ground	Driver's buckle switch OFF (Seat belt fastened)	No continuity
      10 - Ground	Constant	Continuity
      1 - Ground 2 - Ground	Constant	Battery positive voltage
      7 - Ground 9 - Ground	Ignition switch LOCK or ACC	No voltage
      7 - Ground 9 - Ground	Ignition switch ON	Battery positive voltage

   2. Disconnect the connector from the integration relay and inspect the connectors on the wire harness side.
   Fig 7: Identifying A And B Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the circuit is as specified, replace the relay with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.