POWER BACK DOOR SYSTEM Door Control Switch Circuit

DESCRIPTION

The back door control switch only turns on while the switch is being pressed, and turns off when the back door control switch is released.

When the back door control switch is on, a power back door close request signal is input to the power back door unit assembly (power back door ECU) to close the back door.

PROCEDURE

1. Click here

   READ VALUE USING INTELLIGENT TESTER (PBD CLOSE SW)

   
   

   1. Check the Data List for proper functioning of the back door control switch (Click here).

      Table 1. Back Door

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      PBD Close SW	Back door control switch signal / ON or OFF	ON: Back door control switch on OFF: Back door control switch off	-

      OK
      The display is as specified in the normal condition.

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

   • NGClick here
2. Click here

   INSPECT BACK DOOR CONTROL SWITCH

   
   

   1. Remove the back door control switch (Click here).

   2. Inspect the back door control switch (Click here).

   
   
   • OKClick here
   • NG

     REPLACE BACK DOOR CONTROL SWITCH (Click here)

3. Click here

   CHECK HARNESS AND CONNECTOR (BACK DOOR CONTROL SWITCH - POWER BACK DOOR UNIT ASSEMBLY [POWER BACK DOOR ECU] AND BODY GROUND)

   
   

   1. Disconnect the S25 back door control switch connector.

   2. Disconnect the L52 power back door unit assembly (power back door ECU) connector.

   3. Measure the resistance of the wire harness side connectors.

      Standard Resistance
      Tester Connection Condition Specified Condition S25-3 (MSW) - L52-4 (DS1) Always Below 1 Ω S25-4 (E) - Body ground Always Below 1 Ω S25-3 (MSW) - Body ground Always 10 kΩ or higher

   
   
   • OK

     REPLACE POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU) (Click here)

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR