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).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE ON INTELLIGENT TESTER

   
   

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

      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.

   
   

   NG

   INSPECT POWER BACK DOOR OPENER / CLOSER SWITCH Click here

   OK

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

   
   

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

   
   

   NEXT

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

   
   

   1. Check that the power back door operates normally.

      OK
      It operates normally.

   
   

   NG

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

   OK

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

4. 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

   
   

   NG

   REPLACE POWER BACK DOOR OPENER / CLOSER SWITCH Click here

   OK

5. 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

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

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

   
   

   NEXT

7. CHECK POWER BACK DOOR ECU

   
   

   1. Check that the power back door operates normally.

      OK
      It operates normally.

   
   

   NG

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

   OK

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