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 signal for manual unlocking operation on driver side door and the signal for unlocking operation interlocked with the driver side door lock key cylinder are sent to the back door ECU from the body ECU using the MPX line. Also, the signal of the back door opener switch is directly sent to the back door ECU. In response to these signals, the back door ECU controls the back door lock.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Check the data list of back door opener switch.

Back Door





OK -- PERFORM ACTIVE TEST USING TECHSTREAM

NG -- Continue to next step.

2. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY




(a) Remove the back door opener switch.
(b) Inspect the back door opener switch continuity.
Standard resistance:





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

3. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BACK DOOR ECU)




(a) Disconnect the B10 back door opener switch and B9 back door ECU connectors.
(b) Check the continuity between the terminals of the back door opener switch (B10) and back door ECU (B9) connectors.
Standard resistance (Check for open) ::





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

4. PERFORM ACTIVE TEST USING TECHSTREAM
(a) Select the active test, and then check that the power door lock operates.

HINT: During the active test, the Techstream sends signal to the body ECU to drive the all power door lock motor. If the all power door lock operates, the power door lock motor itself and the wire harness between the power door lock motor and body ECU are considered normal.

Body





OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG -- Continue to next step.

5. INSPECT W/MOTOR BACK DOOR LOCK ASSEMBLY




(a) Check operation of the door lock.
(1) Using a screwdriver, push the latch in order to put the back door lock in the locked condition (full-latch position).
(2) Connect the positive (+) lead to terminal 1 and the negative (-) lead to terminal 2. Then, check operation of the latch.
Standard:
The latch turns to the open-latch position
(3) Inspect motor operation when battery voltage is applied to the terminals.
Standard:








(b) Check the back door courtesy switch continuity.
(1) Check the continuity between the terminals of the courtesy switch.
Standard resistance:





(c) Check the back door latch switch continuity.
(1) Check the continuity between the terminals of the latch switch.
Standard resistance:





(d) Check the position switch continuity.
(1) Connect the battery positive (+) lead to connector terminal 1 and the negative (-) lead to connector terminal 2.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE W/MOTOR BACK DOOR LOCK ASSEMBLY