LIGHTING SYSTEM Back Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU receives a No. 2 room light information signal from the back door courtesy light switch, and illuminates the No. 2 room light.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   READ VALUE USING INTELLIGENT TESTER (BACK DOOR COURTESY SWITCH)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the intelligent tester on.

   4. Enter the following menus: Body / Main Body / Data List / Back Door Courtesy Switch.

   5. Use the Data List to check if the back door courtesy light switch is operating properly.

      Table 1. Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Back Door Courtesy Switch	Back door courtesy light switch / ON or OFF	ON: Back door courtesy light switch on OFF: Back door courtesy light switch off	-

      OK
      Tester display changes according to opening and closing of back door.

   
   
   • OKClick here
   • NGClick here
2. Click here

   INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH)

   
   
   1. 

      Remove the back door lock assembly (back door courtesy light switch) (Click here).

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 (ACT-) - 3 (D+) Back door closed 10 kΩ or higher Back door opened Below 1 Ω

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU AND BODY GROUND)

   
   
   1. 

      Disconnect the S8 back door lock assembly (back door courtesy light switch) connector.

   2. Disconnect the DA main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition DA-7 (BCTY) - S8-3 (D+) Always Below 1 Ω S8-1 (ACT-) - Body ground Always Below 1 Ω S8-3 (D+) - Body ground Always 10 kΩ or higher

      Table 2. Text in Illustration

      *1	Front view of wire harness connector (to Back Door Lock Assembly)
      *2	Front view of wire harness connector (to Main Body ECU)

   
   
   • OKClick here
   • NGClick here
4. Click here

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

5. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

6. Click here

   REPLACE BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH)Click here

7. Click here

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE