POWER DOOR LOCK CONTROL SYSTEM > Back Door Courtesy Switch Circuit

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DESCRIPTION

w/o power back door system:
The back door courtesy switch is built into the back door lock assembly. The switch turns on when the back door is opened and turns off when the door is closed. The body ECU applies voltage to the back door lock assembly via terminal BCTY. Back door open/close state signals are input to the body ECU.
w/ power back door system:
The back door courtesy switch is built into the back door lock assembly. The switch turns on when the back door is opened and turns off when the door is closed. The power back ECU applies voltage to the back door lock assembly via terminal CTYE. Back door open/close state signals are input to the power back door ECU. The back door ECU sends the back door open/close state signals to the body ECU.

WIRING DIAGRAM


B112754E02


INSPECTION PROCEDURE

1.CHECK VEHICLE TYPE
Vehicle type
Proceed to
w/o Power back door system
A
w/ Power back door system
B


B
Go to step 4
A


2.INSPECT BACK DOOR LOCK ASSEMBLY


    B070506E01

  1. Remove the back door lock assembly.

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

    Standard resistance (Courtesy switch):
    Tester Connection
    		Door Lock Latch Position
    		Specified Condition
    1 - 2
    		Open-latch
    		Below 1 Ω
    1 - 2
    		Half-latch
    		Below 1 Ω
    1 - 2
    		Full-latch
    		10 kΩ or higher
    1 - 2
    		Over-latch
    		10 kΩ or higher



NG
REPLACE BACK DOOR LOCK ASSEMBLY
OK


3.CHECK WIRE HARNESS (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL J/B (BODY ECU))


    B112756E02

  1. Disconnect the back door lock assembly connector.

  1. Disconnect the instrument panel J/B connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B11-1 - B7-25 (BCTY)
    		Always
    		Below 1 Ω
    B11-2 - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

4.READ VALUE OF DATA LIST

  1. Check the DATA LIST to ensure proper operation of the back door courtesy switch.

    Power back door ECU 
    Item
    		Measurement Item /
    Display (Range)
    		Normal Condition
    		Diagnostic Note
    COURTESY SW
    		Back door courtesy switch signal (built in power back door lock)
    /ON or OFF
    		ON: Driver side door is open
    OFF: Driver side door is closed
    		-

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



NG
Go to step 6
OK


5.CHECK WIRE HARNESS (POWER BACK DOOR ECU - INSTRUMENT PANEL J/B)


    B112755E02

  1. Disconnect the power back door ECU connector.

  1. Disconnect the instrument panel J/B connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P10-19 (CTYO) - B7-25 (BCTY)
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

6.INSPECT BACK DOOR LOCK ASSEMBLY


    B070505E01

  1. Remove the back door lock assembly.

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

    Standard resistance (Courtesy switch):
    Tester Connection
    		Door Lock Latch Position
    		Specified Condition
    1 - 6
    		Open-latch
    		Below 1 Ω
    1 - 6
    		Half-latch
    		Below 1 Ω
    1 - 6
    		Full-latch
    		10 kΩ or higher
    1 - 6
    		Over-latch
    		10 kΩ or higher



NG
REPLACE BACK DOOR LOCK ASSEMBLY
OK


7.CHECK WIRE HARNESS (BACK DOOR LOCK ASSEMBLY - POWER BACK DOOR ECU)


    B111702E09

  1. Disconnect the back door lock 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
    B12-1 - P10-7 (CTYE)
    		Always
    		Below 1 Ω
    B12-6 - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE