Door Courtesy Switch Circuit: Procedure

1. Check the DATA LIST for proper functioning of the courtesy switch.
   BODY (MULTIPLEX NETWORK BODY ECU)
   
   

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   D door Courtesy SW	Driver side courtesy switch / ON or OFF	ON: Driver side door is open OFF: Driver side door is closed	-
   P door Courtesy SW	Passenger side courtesy switch / ON or OFF	ON: Passenger side door is open OFF: Passenger side door is closed	-
   Rear door Courtesy SW	Rear (LH or RH) courtesy switch / ON or OFF	ON: Rear door (LH or RH) is open OFF: Rear door (LH or RH) is closed	-

   OK

   Condition sign can be displayed.

   Result

   Result	Proceed to
   OK	A
   Driver side door courtesy switch does not operate	B
   Front passenger side door courtesy switch does not operate	C
   Both rear door courtesy switches do not operate	D

D → See step   6 

C → See step   4 

B → See step   2 

A → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

Inspection. Refer to INSPECTION

OK

Door courtesy light switch is normal.

NG → REPLACE DOOR COURTESY SWITCH (FRONT LH) 

OK: Go to next step 

1. Disconnect the U1 ECU connector.
   Fig 1: Identifying U1 ECU Connector And V7 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the V7 switch connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   U1-14 (DCTY) - V7-1	Below 1 Ω
   U1-14 (DCTY) or V7-1 - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

Inspection. Refer to INSPECTION

OK

Door courtesy light switch is normal.

NG → REPLACE DOOR COURTESY SWITCH (FRONT RH) 

OK: Go to next step 

1. Disconnect the K68 ECU connector.
   Fig 2: Identifying K68 ECU Connector And U4 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the U4 switch connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   K68-23 (PCTY) - U4-1	Below 1 Ω
   K68-23 (PCTY) or U4-1 - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

Inspection. Refer to INSPECTION

OK

Door courtesy light switch is normal.

NG → REPLACE DOOR COURTESY SWITCH (REAR LH OR REAR RH) 

OK: Go to next step 

1. Check the wire harness between the cowl side junction block RH and door courtesy switch (rear LH).
   Fig 3: Identifying DA Junction Block Connector And V13 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the DA junction block connector.
   2. Disconnect the V13 switch connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection	Specified Condition
      DA-11 (LCTY) - V13-1	Below 1 Ω
      DA-11(LCTY) or V13-1 - Body ground	10 kΩ or higher

2. Check the wire harness between the multiplex network body ECU and door courtesy switch (rear RH).
   Fig 4: Identifying U1 ECU Connector And U11 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the U1 ECU connector.
   2. Disconnect the U11 switch connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection	Specified Condition
      U1-16 (RCTY) - U11-1	Below 1 Ω
      U1-16 (RCTY) or U11-1 - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE