Inspection Procedure

1. Check the DATA LIST for proper functioning of the unlock warning switch.

   Standard: 

Multiplex network body ECU 

1. OK: Go to step   4 
2. NG: Go to next step 

1. Remove the unlock warning switch.
2. Check the resistance of the switch.

   Standard: 

   UNLOCK WARNING SWITCH TERMINALS RESISTANCE
   
   

   Tester Connection	Switch Position	Specified Condition
   1 - 2	Free	10 kΩ or higher
   	Pushed	Below 1 Ω

   Fig 1: Identifying Unlock Warning Switch Position And Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE UNLOCK WARNING SWITCH ASSY 
2. OK: Go to next step 

1. Disconnect the K4 switch and B4 ECU connectors.
2. Check the resistance of the wire harness side connectors.

   Standard: 

   RESISTANCE BETWEEN UNLOCK WARNING SWITCH ASSY AND MULTIPLEX NETWORK BODY ECU CONNECTOR TERMINALS
   
   

   Tester Connection	Specified Condition
   K4-2 - B4-21 (KSW)	Below 1 Ω
   K4-1 - Body ground

   Fig 2: Identifying Unlock Warning Switch Assy And Multiplex Network Body ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK: REPLACE MULTIPLEX NETWORK BODY ECU 

1. Check the DATA LIST for proper functioning of the driver side door courtesy lamp switch.

   Standard: 

   Multiplex network body ECU 

   VALUE OF HAND-HELD TESTER (MULTIPLEX NETWORK BODY ECU)
   
   

   Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
   D DOR CTY SW	Driver side door courtesy lamp switch signal/ON or OFF	ON: Driver side door is open OFF: Driver side door is closed	-

1. OK: REPLACE MULTIPLEX NETWORK BODY ECU 
2. NG: Go to next step 

1. Remove the courtesy lamp switch.
2. Check the resistance of the switch.

   Standard: 

   COURTESY LAMP SWITCH TERMINALS RESISTANCE
   
   

   Tester Connection	Switch Position	Specified Condition
   1 - Body ground	Free	Below 1 Ω
   	Pushed	10 kΩ or higher

   Fig 3: Identifying Courtesy Lamp Switch Free And Pushed Position

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSY (DRIVER SIDE) 
2. OK: Go to next step 

1. Disconnect the D6 switch and B6 ECU connectors.
2. Check the resistance of the wire harness side connectors.

   Standard (Check for open circuit): 

   RESISTANCE BETWEEN FRONT DOOR COURTESY LAMP SWITCH AND MULTIPLEX NETWORK BODY ECU CONNECTOR TERMINALS
   
   

   Tester Connection	Specified Condition
   D6-1 - B6-14 (DCTY)	Below 1 Ω

   Fig 4: Identifying Front Door Courtesy Lamp Switch And Multiplex Network Body ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK: REPLACE MULTIPLEX NETWORK BODY ECU