BACK DOOR CLOSER SYSTEM Back Door Closer does not Operate

DESCRIPTION

When the back door closer does not operate, one of the following may be the cause: 1) improper fit of the back door, or a foreign object is stuck in the back door, 2) initialization of the multiplex network door ECU, 3) a malfunction in the multiplex network door ECU power source circuit, 4) a malfunction in the back door lock assembly circuit, or 5) a malfunction in the multiplex network door ECU.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK FOR DTC

   
   

   1. Check for DTCs.

      Click here

      
      Body Electrical > Back Door > Trouble Codes

      Result
      Proceed to DTC is not output DTC B2250 is output DTC B2251 is output

   
   

   DTC B2250 is output

   GO TO DTC CHART Click here

   DTC B2251 is output

   GO TO DTC CHART Click here

   DTC is not output

2. CHECK BACK DOOR LOCK FUNCTION

   
   

   1. Check if the back door can be fully closed by hand.

      Result
      Proceed to The back door can be closed normally The back door cannot be closed normally

   
   

   The back door cannot be closed normally

   IMPROPER FIT OF BACK DOOR, OR A FOREIGN OBJECT IS STUCK IN BACK DOOR

   The back door can be closed normally

3. INITIALIZATION MULTIPLEX NETWORK DOOR ECU

   
   

   1. Perform the initialization of the multiplex network door ECU.

      Click here

      Result
      Proceed to NEXT

   
   

   NEXT

4. CHECK BACK DOOR CLOSER

   
   

   1. Check back door closer operation.

      Click here

      Result
      Proceed to The back door closer operates normally The back door closer operates not normally

   
   

   The back door closer operates normally

   END

   The back door closer operates not normally

5. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - BATTERY AND BODY GROUND)

   
   
   1. 

      *a	Rear view of wire harness connector (to Multiplex Network Door ECU)

      Disconnect the multiplex network door ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition U19-7 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition U18-1 (ECUB) - Body ground Always 11 to 14 V U19-8 (B) - Body ground Always 11 to 14 V U18-7 (IG) - Body ground Ignition switch ON 11 to 14 V U18-7 (IG) - Body ground Ignition switch off Below 1 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. INSPECT BACK DOOR LOCK ASSEMBLY

   
   

   1. Remove the back door lock assembly.

      Click here

   2. Inspect the back door lock assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE BACK DOOR LOCK ASSEMBLY Click here

   OK

7. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)

   
   

   1. Disconnect the U13 back door lock assembly connector.

   2. Disconnect the U18 and U19 multiplex network door ECU connectors.

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

      Standard Resistance

      Tester Connection Condition Specified Condition U13-1 (M+) - U19-10 (DC+) Always Below 1 Ω U13-2 (M-) - U19-9 (DC-) Always Below 1 Ω U13-3 (CTY) - U18-19 (FUL) Always Below 1 Ω U13-5 (CLS) - U18-21 (HAF) Always Below 1 Ω U13-6 (OPN) - U18-24 (POS) Always Below 1 Ω U13-4 (E) - Body ground Always Below 1 Ω U13-1 (M+) or U19-10 (DC+) - Body ground Always 10 kΩ or higher U13-2 (M-) or U19-9 (DC-) - Body ground Always 10 kΩ or higher U13-3 (CTY) or U18-19 (FUL) - Body ground Always 10 kΩ or higher U13-5 (CLS) or U18-21 (HAF) - Body ground Always 10 kΩ or higher U13-6 (OPN) or U18-24 (POS) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE MULTIPLEX NETWORK DOOR ECU Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR