Back Door Cannot Be Opened

DOOR / HATCH: BACK DOOR CLOSER SYSTEM: Back Door cannot be Opened
- Back Door cannot be Opened

DESCRIPTION

When the back door cannot be opened, one of the following may be malfunctioning: 1) power back door ECU (power back door motor unit), 2) back door lock assembly, 3) back door opener switch assembly, or 4) main body ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
The back door closer system uses CAN communication. First, follow "How to Proceed with Troubleshooting" and at step "Check Communication Function of CAN Communication System", confirm that there is no malfunction in the CAN communication system. After confirming that B2250 or B2251 is not output, proceed with troubleshooting.

PROCEDURE

1. READ VALUE USING TECHSTREAM (BACK DOOR OPEN)

(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 / Data List.

(e) Check if the back door lock functions properly.

Main Body (Main Body ECU)





OK:

The back door functions as specified in the normal condition column.

NG -- REPLACE MAIN BODY ECU Removal
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (DOOR LOCK STATUS)

(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 / Back Door / Data List.

(e) Check if the back door lock functions properly.

Back Door (Power Back Door ECU)





OK:

The back door functions as specified in the normal condition column.

NG -- REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) Removal
OK -- Continue to next step.

3. READ VALUE USING TECHSTREAM (BACK DOOR OPEN HANDLE SW)

(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 / Data List.

(e) Check if the switch functions properly.

Main Body (Main Body ECU)





OK:

The back door opener switch functions as specified in the normal condition column.

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

4. INSPECT BACK DOOR LOCK ASSEMBLY Back Door Closer Does Not Operate

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

5. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - POWER BACK DOOR ECU) Back Door Closer Does Not Operate

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) Removal

6. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY

(a) Remove the back door opener switch assembly Removal.

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





Text in Illustration





Standard Resistance:





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

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

(a) Disconnect the W14 back door opener switch assembly connector and D13 main body ECU 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 Removal