Back Door Closer Does Not Operate

DOOR / HATCH: BACK DOOR CLOSER SYSTEM: Back Door Closer does not Operate
- Back Door Closer does not Operate

DESCRIPTION

When the back door closer does not operate, one of the following may be the cause 1) improper fit of the back door, or a foreign object is stuck in the back door 2) initialization of the power back door ECU (power back door motor unit), 3) a malfunction in the power back door ECU (power back door motor unit) power source circuit, 4) a malfunction in the back door lock circuit or 5) a malfunction in the power back door ECU (power back door motor unit).

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
Inspect fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK BACK DOOR LOCK FUNCTION

(a) Check if the back door can be fully closed by hand.

OK:

The back door can be closed normally.

NG -- IMPROPER FIT OF BACK DOOR, OR A FOREIGN OBJECT IS STUCK IN BACK DOOR
OK -- Continue to next step.

2. INITIALIZE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT)

(a) Perform the initialization of the power back door ECU (power back door motor unit) Back Door Closer System.

NEXT -- Continue to next step.

3. CHECK BACK DOOR CLOSER SYSTEM

(a) Check back door closer system operation Operation Check.

OK:

The back door closer system operates normally.

NG -- READ VALUE USING TECHSTREAM (POWER BACK DOOR TOUCH SENSOR)

OK -- END

4. READ VALUE USING TECHSTREAM (POWER BACK DOOR TOUCH SENSOR)

(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 / Back Door / Data List.

(e) Check the Data List to determine if the power back door touch sensor functions properly.

Back Door (Power Back Door ECU (Power Back Door Motor Unit))

Result:

B -- GO TO OTHER FLOW CHART (TOUCH SENSOR CIRCUIT) Component Tests and General Diagnostics
A -- Continue to next step.

5. CHECK DTC OUTPUT

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Recheck for DTCs.

Result:

B -- GO TO DTC CHART (B2250) B2250

C -- GO TO DTC CHART (B2251) B2251
A -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

(a) Disconnect the P33 power back door ECU connector.

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

Standard Voltage:

Text in Illustration

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

7. CHECK HARNESS AND CONNECTOR (BODY GROUND)

(a) Disconnect the P33 power back door ECU connector.

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

Standard Resistance:

Text in Illustration

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

8. INSPECT BACK DOOR LOCK ASSEMBLY

(a) Remove the back door lock assembly Removal.

(b) Check the operation of the back door closer motor.

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

OK:

Text in Illustration

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

Standard Resistance:

Close Operation

Open Operation

(d) Check the operation of the pawl switch.

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

Standard Resistance:

Close Operation

(e) Check the operation of the back door courtesy switch.

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

Standard Resistance:

(f) Check the operation of the sector 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.

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

(a) Disconnect the Y10 back door lock connector and P33 ECU connector.

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

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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