POWER BACK DOOR SYSTEM > Power Back Door Closer Switch Circuit

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DESCRIPTION

The power back door closer switch only turns on while the switch is being pressed, and turns off when the switch is released.
The power back door ECU is connected to the power back door closer switch via terminal BDDN and power back door operation request signals are input to the ECU.
The power back door ECU applies voltage to the power back door closer switch via terminal BDDN. When the switch is on (there is continuity between the switch terminals), a power back door close request signal is input to the power back door ECU to close the back door.

NOTICE:
The power back door ECU records the back door positions in the memory. In the case where any of the batteries, fuses, power back door ECU and power back door drive unit are removed and then reinstalled, the power back door ECU loses the memory of the door positions. In such a case, resetting the power back door system is necessary. Refer to the resetting operation specified in page Click here.


WIRING DIAGRAM


B109773E20


INSPECTION PROCEDURE

1.READ VALUE OF DATA LIST (POWER BACK DOOR CLOSER SWITCH)

  1. Check the DATA LIST to ensure proper function of the power back door closer switch.

    Power Back Door ECU: 
    Item
    		Measurement Item /
    Display (Range)
    		Normal Condition
    		Diagnostic Note
    PBD Closer SW
    		Power back door closer switch signal
    /OFF or ON
    		OFF: Power back door closer switch OFF
    ON: Power back door closer switch ON
    		-

    OK:
    The display is as specified in the normal condition.



NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

2.INSPECT POWER BACK DOOR CLOSER SWITCH ASSEMBLY


    B070512E01

  1. Remove the power back door closer switch assembly connector.

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

    Standard resistance:
    Tester Connection
    		Switch Position
    		Specified Condition
    1 - 2
    		Pushed (ON)
    		Below 1 Ω
    1 - 2
    		Free (OFF)
    		10 kΩ or higher



NG
REPLACE POWER BACK DOOR CLOSER SWITCH ASSEMBLY
OK


3.CHECK WIRE HARNESS (POWER BACK DOOR CLOSER SWITCH - POWER BACK DOOR ECU)


    B112722E02

  1. Disconnect the power back door closer switch assembly connector.

  1. Disconnect the power back door ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P8-1 - P10-4 (BDDN)
    		Always
    		Below 1 Ω
    P8-2 - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE