Power Back Door Cannot Be Operated Using Any Switch

DOOR / HATCH: POWER BACK DOOR SYSTEM: Power Back Door cannot be Operated Using Any Switch
- Power Back Door cannot be Operated Using Any Switch

DESCRIPTION

When the power back door cannot be operated using any switch, one of the following may be the cause: 1) initialization of the power back door ECU (power back door motor unit), 2) power back door touch sensor circuit, 3) power back door main switch circuit, 4) back door closer system, 5) meter/gauge system, 6) main body ECU (multiplex network body ECU) or 7) power back door ECU (power back door motor unit).

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
The power back door system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure How To Proceed With Troubleshooting.

PROCEDURE

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

(a) Perform the initialization for the power back door ECU (power back door motor unit) Initialization.

NEXT -- Continue to next step.

2. CHECK POWER BACK DOOR SYSTEM

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

OK:

Power back door system operates normally.

NG -- CHECK BACK DOOR CLOSER SYSTEM

OK -- END

3. CHECK BACK DOOR CLOSER SYSTEM

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

OK:

Back door closer system operates normally.

NG -- GO TO BACK DOOR CLOSER SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

4. CHECK COMBINATION METER ASSEMBLY

(a) Check shift position indicator operation and that the speedometer indicates 0 km/h (0 mph) when the vehicle is stopped and the engine idling.

OK:

Combination meter operates normally.

NG -- GO TO METER/GAUGE SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

5. CHECK POWER DOOR LOCK OPERATION (BASIC FUNCTION)

(a) Check the power door lock basic function Operation Check.

OK:

The power door lock basic function operates normally.

NG -- GO TO POWER DOOR LOCK CONTROL SYSTEM Problem Symptoms Table
OK -- Continue to next step.

6. CHECK DTC OUTPUT

(a) Check for DTCs Power Back Door System.

Result:





E -- GO TO OTHER FLOW CHART (B2251) B2251

D -- GO TO OTHER FLOW CHART (B2250) B2250

C -- GO TO OTHER FLOW CHART (B2225) B2225

B -- GO TO OTHER FLOW CHART (B2222) B2222
A -- Continue to next step.

7. READ VALUE USING TECHSTREAM (BACK DOOR LOCK ASSEMBLY)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Check the Data List to determine if the back door lock assembly functions properly.

Main Body (Main Body ECU (Multiplex Network Body ECU))





OK:

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

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
OK -- Continue to next step.

8. READ VALUE USING TECHSTREAM (BACK DOOR LOCK ASSEMBLY)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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 back door lock assembly functions properly.

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





OK:

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

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

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

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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.

10. READ VALUE USING TECHSTREAM (POWER BACK DOOR MAIN SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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 main switch functions properly.

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





OK:

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

NG -- INSPECT POWER BACK DOOR MAIN SWITCH

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

11. INSPECT POWER BACK DOOR MAIN SWITCH

(a) Remove the power back door main switch Removal.





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

Standard Resistance:





Text in Illustration





NG -- REPLACE POWER BACK DOOR MAIN SWITCH Removal
OK -- Continue to next step.

12. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR MAIN SWITCH - POWER BACK DOOR ECU)

(a) Disconnect the G18 power back door main switch connector and 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 -- REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) Removal

13. REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT)

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

NEXT -- Continue to next step.

14. CHECK POWER BACK DOOR SYSTEM

(a) Check the power back door system Operation Check.

OK:

The power back door system operates normally.

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

OK -- END (POWER BACK DOOR ECU WAS DEFECTIVE)