Only Back Door Lock / Unlock Functions Do Not Operate

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Only Back Door LOCK / UNLOCK Functions do not Operate
- Only Back Door LOCK / UNLOCK Functions do not Operate

DESCRIPTION

* The main body ECU (instrument panel junction block) detects the condition of the back door opener switch.

* The main body ECU (instrument panel junction block) receives signals from the back door opener switch and activates the back door lock motor according to the signals.

* The main body ECU (instrument panel junction block) detects the condition of the back door courtesy switch.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. SYSTEM CHECK

(a) Check if the vehicle is equipped with a back door closer system.

Result:





A -- GO TO BACK DOOR CLOSER SYSTEM (Back Door cannot be Opened) Back Door Cannot Be Opened
B -- Continue to next step.

2. READ VALUE USING TECHSTREAM

(a) Connect Techstream to the DLC3.

(b) Turn the ignition switch on (IG).

(c) Turn the tester on.

(d) Enter the following menus:

Body Electrical / Main Body / Data List.

(e) Select Back Door Open Handle in the Data List and read the tester display.

Main Body (Main Body ECU):





OK:

On the tester screen, the item changes between ON and OFF according to the chart above.

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

3. INSPECT BACK DOOR LOCK ASSEMBLY

(a) Remove the back door lock assembly Removal.





(b) Check 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.

OK:





(c) Check operation of the door courtesy switch.

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

Standard resistance:





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

4. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK CIRCUIT)

(a) Disconnect the main body ECU (instrument panel junction block) connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

5. INSPECT BACK DOOR OPENER SWITCH

(a) Remove the back door opener switch Removal.





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

Standard resistance:





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

6. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH CIRCUIT)

(a) Disconnect the main body ECU (instrument panel junction block) connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)