LIGHTING SYSTEM > Door Courtesy Switch Circuit

for Preparation Click here


DESCRIPTION

The main body ECU receives a door open/closed signal from each door courtesy switch.

WIRING DIAGRAM


E177318E01


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Body / Main Body / Data List.

  1. According to the display on the tester, read the Data List.

    Main Body 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Back Door Courtesy SW
    		Back door courtesy switch signal/ ON or OFF
    		ON: Back door is open
    OFF: Back door is closed
    		-
    FR Door Courtesy SW
    		Front RH door courtesy switch signal/ ON or OFF
    		ON: Front RH door is open
    OFF: Front RH door door is closed
    		-
    FL Door Courtesy SW
    		Front LH door courtesy switch signal/ ON or OFF
    		ON: Front LH door is open
    OFF: Front LH door is closed
    		-

    OK:
    Normal conditions listed above are displayed.



NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)  

2.INSPECT DOOR COURTESY SWITCH

  1. Inspect the front door courtesy light switch (Click here), back door courtesy switch (Click here).

    OK:
    Door courtesy switches are normal.

Result 
Result
Proceed to
OK
A
NG (Front door courtesy light switch)
B
NG (Back door courtesy switch)
C


B
REPLACE FRONT DOOR COURTESY LIGHT SWITCH (Click here)

C
REPLACE BACK DOOR LOCK ASSEMBLY (Click here)
A


3.CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH - JUNCTION BLOCK AND BODY GROUND)


    E174441E01

  1. Disconnect the 3E instrument panel junction block connector.

  1. Disconnect G1 and G2 front door courtesy light switch connector.

  1. Disconnect the J3 back door lock assembly connector.

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

    Standard Resistance:
    Front RH Side 
    Tester Connection
    		Condition
    		Specified Condition
    3E-35 - G1-1
    		Always
    		Below 1 Ω
    G1-1 - Body ground
    		Always
    		10 kΩ or higher
    Front LH Side 
    Tester Connection
    		Condition
    		Specified Condition
    3E-24 - G2-1
    		Always
    		Below 1 Ω
    G2-1 - Body ground
    		Always
    		10 kΩ or higher
    Back Door 
    Tester Connection
    		Condition
    		Specified Condition
    3E-27 - J3-3
    		Always
    		Below 1 Ω
    J3-3 - Body ground
    		Always
    		10 kΩ or higher
    J3-1 - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Instrument Panel Junction Block)
    *2
    		Front view of wire harness connector
    (to Front Door Courtesy Light Switch)
    *3
    		Front view of wire harness connector
    (to Back Door Lock Assembly)
    *4
    		Front RH
    *5
    		Front LH

  1. Reconnect the instrument panel junction block connector.

  1. Reconnect front door courtesy light switch connector.

  1. Reconnect the back door lock assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAIN BODY ECU)


    E174442E01

  1. Disconnect the 3C instrument panel junction block connector.

  1. Disconnect the D42 main body ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3C-30 - D42-19 (BCTY)
    		Always
    		Below 1 Ω
    3C-30 or D42-19 (BCTY) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Instrument Panel Junction Block)
    *2
    		Front view of wire harness connector
    (to Main Body ECU)

  1. Reconnect the instrument panel junction block connector.

  1. Reconnect the main body ECU connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE MAIN BODY ECU

  1. Temporarily replace the main body ECU with a new or normally functioning one (Click here).


NEXT


6.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Body / Main Body / Data List.

  1. According to the display on the tester, read the Data List.

    Main Body 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Back Door Courtesy SW
    		Back door courtesy switch signal/ ON or OFF
    		ON: Back door is open
    OFF: Back door is closed
    		-
    FR Door Courtesy SW
    		Front RH door courtesy switch signal/ ON or OFF
    		ON: Front RH door is open
    OFF: Front RH door door is closed
    		-
    FL Door Courtesy SW
    		Front LH door courtesy switch signal/ ON or OFF
    		ON: Front LH door is open
    OFF: Front LH door is closed
    		-

    OK:
    Normal conditions listed above are displayed.



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK
OK

END (MAIN BODY ECU IS DEFECTIVE)