Back Door Cannot Be Opened

ENGINE HOOD / DOOR: 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 drive unit (power back door ECU), or 2) back door lock, or 3) back door open switch, or 4) main body ECU (instrument panel junction block).

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Check the Data List to determine if the back door lock function properly.

Back Door (Power back door ECU)





OK:

The back door functions as specified in the normal condition.

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

2. READ VALUE USING TECHSTREAM

(a) Check the Data List to determine if the back door handle switch function properly.

Main body ECU (Instrument panel junction block)





OK:

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

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

3. INSPECT BACK DOOR LOCK





(a) Remove the back door lock Removal.

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

OK:





(c) Measure the resistance of the switch.

Standard resistance:

Full-latch switch
Sector switch
Back door courtesy light switch














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

4. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU)

(a) Disconnect the T4 back door lock connector.





(b) Disconnect the O15 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 POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) Removal

5. INSPECT BACK DOOR OPENER SWITCH

(a) Remove the back door opener switch Back Door Opener Switch.





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

Standard resistance:





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

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

(a) Disconnect the h1 switch connector.





(b) Disconnect the D8 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 MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

7. REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)

(a) Replace the power back door drive unit (power back door ECU) Removal.

NEXT -- Continue to next step.

8. CHECK POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)

(a) Check that the back door closer operates normally.

OK:

It operates normally.

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

OK -- END (REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) DEFECTIVE)