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Power Back Door Cannot Be Operated Using Any Switch





ENGINE HOOD / DOOR: 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, or a malfunction in the 2) power back door touch sensor circuit, 3) power back door main switch circuit, 4) back door closer system, 5) meter/gauge system, or 6) main body ECU (instrument panel junction block), or 7) power back door drive unit (power back door ECU).

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INITIALIZE POWER BACK DOOR ECU

(a) Check that the power back door drive unit (power back door ECU) can be initialized Initialization.

NEXT -- Continue to next step.

2. CHECK POWER BACK DOOR SYSTEM

(a) Check the power back door system operation.

OK:

Power back door system operates normally.

NG -- CHECK BACK DOOR CLOSER SYSTEM

OK -- END

3. CHECK BACK DOOR CLOSER SYSTEM

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

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

4. CHECK COMBINATION METER

(a) Check the A/T shift position indicator operation.

(b) Check that the speedometer indicates 0 mph when the vehicle is stopped and the engine idling.

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

5. CHECK DTC OUTPUT

(a) Check for the DTCs Power Back Door System.

Result:





B -- GO TO DTC CHART (B2250) B2250

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

6. READ VALUE ON TECHSTREAM

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

Main body ECU (Instrument panel junction block)





OK:

The back door functions as specified in the normal condition.

NG -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
OK -- Continue to next step.

7. READ VALUE ON TECHSTREAM

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

Back door (Power back door ECU)





OK:

The power back door touch sensor functions as specified in the normal condition.

NG -- GO TO OTHER FLOW CHART Power Back Door System
OK -- Continue to next step.

8. READ VALUE ON TECHSTREAM

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

Back door (Power back door ECU)





OK:

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

NG -- INSPECT POWER BACK DOOR MAIN SWITCH

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

9. 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:





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

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

(a) Disconnect the E21 switch 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