Lighting System Door Courtesy Switch Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF INTELLIGENT TESTER

INSPECT DOOR COURTESY SWITCH (FRONT LH)

CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (FRONT LH) - MAIN BODY ECU RH)

INSPECT DOOR COURTESY SWITCH (FRONT RH)

CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (FRONT RH) - MAIN BODY ECU RH)

INSPECT DOOR COURTESY SWITCH (REAR LH AND REAR RH)

CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (REAR LH OR REAR RH) - MAIN BODY ECU RH)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

The procedure is the same for each door courtesy switch circuit. First, inspect the suspected door courtesy switch circuit.

1. Connect the intelligent tester to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Turn the intelligent tester main switch on.
   

4. Select the items below in the DATA LIST for proper functioning of the courtesy switch.
   
   

   DATA LIST: Body (Main Body ECU LH)

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

OK:

Door courtesy switch is normal.

1. Disconnect the P1 ECU connector.
   

2. Disconnect the Q11 switch connector.
   

3. Measure the resistance according to the value(s) in the table below.
   
   

   Standard resistance:

   LHD:

   Tester Connection	Condition	Specified Condition
   P1-14 (DCTY) - Q11-1	Always	Below 1 Ω
   P1-14 (DCTY) or Q11-1 - Body ground	Always	10 kΩ or higher

   RHD:

   Tester Connection	Condition	Specified Condition
   P1-14 (DCTY) - P8-1	Always	Below 1 Ω
   P1-14 (DCTY) or P8-1 - Body ground	Always	10 kΩ or higher

OK:

Door courtesy switch is normal.

1. Disconnect the J75 ECU connector.
   

2. Disconnect the P8 switch connector.
   

3. Measure the resistance according to the value(s) in the table below.
   
   

   Standard resistance:

   RHD:

   Tester Connection	Condition	Specified Condition
   J75-23 (PCTY) - P8-1	Always	Below 1 Ω
   J75-23 (PCTY) or P8-1 - Body ground	Always	10 kΩ or higher

   LHD:

   Tester Connection	Condition	Specified Condition
   J75-23 (PCTY) - Q11-1	Always	Below 1 Ω
   J75-23 (PCTY) or Q11-1 - Body ground	Always	10 kΩ or higher

OK:

Door courtesy switch is normal.

1. Check the wire harness between the cowl side junction block RH and door courtesy switch (rear LH).
   

   1. Disconnect the RA junction block connector.
      

   2. Disconnect the Q17 switch connector.
      

   3. Measure the resistance according to the value(s) in the table below.
      

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      RA-11 (LCTY) - Q17-1	Always	Below 1 Ω
      RA-11(LCTY) or Q17-1 - Body ground	Always	10 kΩ or higher

2. Check the wire harness between the main body ECU RH and door courtesy switch (rear RH).
   

   1. Disconnect the P1 ECU connector.
      

   2. Disconnect the P16 switch connector.
      

   3. Measure the resistance according to the value(s) in the table below.
      

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      P1-16 (RCTY) - P16-1	Always	Below 1 Ω
      P1-16 (RCTY) or P16-1 - Body ground	Always	10 kΩ or higher