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 (multiplex network body ECU) receives signals from the back door opener switch assembly. Then, the main body ECU (multiplex network body ECU) activates the back door lock motor.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION (BASIC FUNCTION)

(a) Check the power door lock basic function Operation Check.

OK:

The power door lock basic functions operate normally.

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

2. READ VALUE USING TECHSTREAM (DOOR LOCK STATUS)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body (Main Body ECU (Multiplex Network Body ECU))





OK:

The Techstream indicates Permit or Prohibit according to the door lock operation shown in the table.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
OK -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Unlock all doors

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Active Test.

(f) Perform the Active Test according to the display on the Techstream.

Main Body (Main Body ECU (Multiplex Network Body ECU))





OK:

The back door lock assembly unlatches when ON is selected.

NG -- INSPECT BACK DOOR LOCK ASSEMBLY

OK -- GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START Back Door Entry Unlock Function Does Not Operate

4. 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 auxiliary battery voltage to the door lock motor and check the operation of the door lock motor.

OK:





(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 Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the main body ECU (multiplex network body ECU) connector.

(b) Disconnect the instrument panel junction block assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Replace the instrument panel junction block assembly Removal.

NEXT -- Continue to next step.

7. CHECK BACK DOOR OPEN OPERATION

(a) Check that the back door can be opened.

OK:

The back door can be opened normally.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

OK -- END (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE)