Only Back Door Cannot Be Opened

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Only Back Door cannot be Opened

Only Back Door cannot be Opened

DESCRIPTION

- The main body ECU (driver side junction block assembly) detects the condition of the back door opener switch assembly.
- The main body ECU (driver side junction block assembly) receives signals from the back door opener switch assembly and activates the back door lock motor according to the signals.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK POWER DOOR LOCK CONTROL SYSTEM (BASIC FUNCTION)
(a) Check the power door lock control system (basic function).
OK:
Power door lock control system operates normally.

NG -- GO TO PROBLEM SYMPTOMS TABLE
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body Electrical / Data List.
(e) Read the Data List according to the display on the Techstream.

Main Body (Main Body ECU (Driver Side Junction Block Assembly))





OK:
The Techstream indicates ON or OFF according to the switch operation as shown in the table.

NG -- INSPECT BACK DOOR OPENER SWITCH ASSEMBLY
OK -- Continue to next step.

3. INSPECT BACK DOOR LOCK ASSEMBLY




(a) Remove the back door lock assembly Removal.
(b) Check the operation of the door lock motor.
(1) Move the door lock to the lock position.
(2) Apply battery voltage to the door lock motor and check the operation of the door lock motor.





(c) Check the operation of the door courtesy switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





NG -- REPLACE BACK DOOR LOCK ASSEMBLY
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU)
(a) Disconnect the D49 and D50 main body ECU connectors.




(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
5. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY
(a) Remove the back door opener switch assembly Removal.




(b) Check the operation of the opener switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





NG -- REPLACE BACK DOOR OPENER SWITCH ASSEMBLY
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - MAIN BODY ECU)




(a) Disconnect the D49 main body ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)