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

When the back door is unlock and the multiplex network door ECU (back door P/W) receives the ON signal from the back door opener switch, it sends the signal to the main body ECU (multiplex network body ECU) which then activates the back door lock motor.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Since the power door lock control system has functions that use LIN communication, first confirm that there is no malfunction in the communication system by inspecting the LIN communication functions in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.

PROCEDURE

1. READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH ASSEMBLY)

(a) Use the Data List to check if the back door opener switch is functioning properly Scan Tool Testing and Procedures.

Back Door P/W





OK:

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

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

2. PERFORM ACTIVE TEST USING TECHSTREAM (BACK DOOR LOCK ASSEMBLY)

(a) Select the Active Test and check that the back door lock operates Scan Tool Testing and Procedures.

Main Body





OK:

The back door lock motor operates normally.

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

3. CHECK MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W)

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





Standard Voltage:





NG -- REPLACE MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W) Removal

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

4. INSPECT BACK DOOR LOCK ASSEMBLY

(a) Set the back door lock to the full-latch position.





(b) Apply battery voltage to the door lock motor connector and check the operation of the door lock motor.

OK:





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 AND BODY GROUND)

(a) Disconnect the W8 back door lock connector.

(b) Disconnect the 2F main body ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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

6. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY

(a) Remove the back door opener switch Testing and Inspection.





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

Standard Resistance:





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

7. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - MULTIPLEX NETWORK DOOR ECU)

(a) Disconnect the back door opener switch connector.

(b) Disconnect the W10 multiplex network door ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W) Removal