POWER BACK DOOR SYSTEM Power Back Door cannot be Opened or Closed Using the Power Back Door Switch

DESCRIPTION

When the power back door cannot be opened or closed using the power back door switch, one of the following may be malfunctioning: 1) power back door opener / closer switch circuit, 2) power back door drive unit (power back door ECU), or 3) main body ECU (instrument panel junction block).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   READ VALUE ON INTELLIGENT TESTER

   
   

   1. Check the Data List to determine if the power back door opener/closer switch function properly.

      Table 1. Main body ECU (Instrument panel junction block)

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Back Door Open SW	Back door opener/closer switch / ON or OFF	ON: Back door opener/closer switch is pushed OFF: Back door opener/closer switch is not pushed	-

      OK
      The power back door opener/closer switch functions as specified in the normal condition.

   
   
   • OKClick here
   • NGClick here
2. Click here

   REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)

   
   

   1. Replace the power back door drive unit (power back door ECU) (Click here).

   
   
   • NEXTClick here
3. Click here

   CHECK POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)

   
   

   1. Check that the power back door operates normally.

      OK
      It operates normally.

   
   
   • OKClick here
   • NGClick here
4. Click here

   INSPECT POWER BACK DOOR OPENER / CLOSER SWITCH

   
   
   1. 

      Remove the power back door opener/closer switch (Click here).

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

      Standard resistance
      Tester Connection Switch Position Specified Condition 4 - 1 Power back door opener/closer switch not pushed (OFF) 10 kΩ or higher 4 - 1 Power back door opener/closer switch pushed (ON) Below 1 Ω

   
   
   • OKClick here
   • NGClick here
5. Click here

   CHECK HARNESS AND CONNECTOR (POWER BACK DOOR OPENER/CLOSER SWITCH - MAIN BODY ECU)

   
   
   1. 

      Disconnect the D38 switch connector.

   2. Disconnect the D7 ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition D38-4 (CSW) - D7-2 (PBDS) Always Below 1 Ω D38-1 (E) - Body ground Always Below 1 Ω D38-4 (CSW) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
6. Click here

   REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)

   
   

   1. Replace the power back door drive unit (power back door ECU) (Click here).

   
   
   • NEXTClick here
7. Click here

   CHECK POWER BACK DOOR ECU

   
   

   1. Check that the power back door operates normally.

      OK
      It operates normally.

   
   
   • OKClick here
   • NGClick here
8. Click here

   REPLACE POWER BACK DOOR OPENER / CLOSER SWITCHClick here

9. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

10. Click here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

11. Click here

    END (REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) DEFECTIVE)