Inspection Procedure

1. Check the Data List for proper functioning of the front door courtesy light switch LH.
   1. Techstream

      Main Body 

      TECHSTREAM DATA LIST - MAIN BODY
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      D Door Courtesy SW	Front door courtesy light switch LH signal / ON or OFF	ON: Driver side door is open OFF: Driver side door is closed	-

      OK: ON (driver door is open) appears on the screen. 

NG: Go TO LIGHTING SYSTEM  (See DOOR COURTESY SWITCH CIRCUIT )

OK: Go to next step 

1. Check the Data List for proper functioning of the unlock warning switch.
   1. Techstream

      Main Body 

      TECHSTREAM DATA LIST - MAIN BODY
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Key Unlock Warning SW	Unlock warning switch signal /ON or OFF	ON: Key is in ignition key cylinder OFF: No key is in ignition key cylinder	-

      OK: ON (Key is in ignition key cylinder) appears on the screen. 

NG: Go to step 3 

OK: REPLACE MAIN BODY ECU 

1. Remove the unlock warning switch (see REMOVAL  ).
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   UNLOCK WARNING SWITCH ASSEMBLY STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Not pushed	10 kΩ or higher
   	Pushed	Below 1 Ω

   Fig 1: Identifying Unlock Warning Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE UNLOCK WARNING SWITCH ASSEMBLY  (see REMOVAL  )

OK: Go to next step 

1. Disconnect the J18 switch connector.
2. Disconnect the J1 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - MAIN BODY ECU AND BODY GROUND) STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J18-1-J1 - 5 (KSW)	Always	Below 1 Ω
   J18-2 - Body ground	Always	10 kΩ or higher
   J1-5 (KSW) - Body ground	Always	10 kΩ or higher

   Fig 2: Identifying J18 Switch And J1 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the combination meter assembly with a new or normally functioning one (see REMOVAL ).
2. Check the key reminder warning system function.

   OK: The key reminder warning system functions properly. 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: END (COMBINATION METER IS DEFECTIVE)