LIGHTING SYSTEM > Door Unlock Detection Switch Circuit

for Preparation Click here


DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch.

WIRING DIAGRAM


E195946E05


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. Read the display on the intelligent tester.

    Main Body 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FL Door Lock Pos
    		Front door unlock detection switch LH signal/ON or OFF
    		ON: Front door LH unlocked
    OFF: Front door LH locked
    		-
    FR Door Lock Pos
    		Front door unlock detection switch RH signal/ON or OFF
    		ON: Front door RH unlocked
    OFF: Front door RH locked
    		-
    RL-Door Lock Pos SW
    		Rear door unlock detection switch LH signal/ON or OFF
    		ON: Rear door LH unlocked
    OFF: Rear door LH locked
    		-
    RR-Door Lock Pos SW
    		Rear door unlock detection switch RH signal/ON or OFF
    		ON: Rear door RH unlocked
    OFF: Rear door RH locked
    		-

    Result:

    Result
    		Proceed to
    OK
    		A
    Front door unlock detection switch LH does not operate
    		B
    Front door unlock detection switch RH does not operate
    		C
    Rear door unlock detection switch LH does not operate
    		D
    Rear door unlock detection switch RH does not operate
    		E



B
Go to step 2

C
Go to step 4

D
Go to step 6

E
Go to step 9
A

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

2.INSPECT FRONT DOOR LOCK ASSEMBLY LH

  1. Inspect the front door lock assembly LH (Click here).

    OK:
    Front door lock assembly LH is normal.



NG
REPLACE FRONT DOOR LOCK ASSEMBLY LH (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY LH - MAIN BODY ECU AND BODY GROUND)

  1. Disconnect the K3 front door lock assembly LH connector.

  1. Disconnect the H16 main body ECU (multiplex network body ECU) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K3-8 (LSSR) - H16-7 (LSFL)
    		Always
    		Below 1 Ω
    K3-8 (LSSR) - Body ground
    		Always
    		10 kΩ or higher
    K3-7 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)  

4.INSPECT FRONT DOOR LOCK ASSEMBLY RH

  1. Inspect the front door lock assembly RH (Click here).

    OK:
    Front door lock assembly RH is normal.



NG
REPLACE FRONT DOOR LOCK ASSEMBLY RH (Click here)
OK


5.CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - MAIN BODY ECU AND BODY GROUND)

  1. Disconnect the J3 front door lock assembly RH connector.

  1. Disconnect the H16 main body ECU (multiplex network body ECU) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J3-7 (LSSR) - H16-18 (LSFR)
    		Always
    		Below 1 Ω
    J3-7 (LSSR) - Body ground
    		Always
    		10 kΩ or higher
    J3-8 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)  

6.INSPECT REAR DOOR LOCK ASSEMBLY LH

  1. Inspect the rear door lock assembly LH (Click here).

    OK:
    Rear door lock assembly LH is normal.



NG
REPLACE REAR DOOR LOCK ASSEMBLY LH (Click here)
OK


7.CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY LH - JUNCTION BLOCK AND BODY GROUND)

  1. Disconnect the M1 rear door lock assembly LH connector.

  1. Disconnect the 2D instrument panel junction block assembly connector.

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

    Standard Resistance:
    for LHD: 
    Tester Connection
    		Condition
    		Specified Condition
    M1-6 (LSSR) - 2D-25
    		Always
    		Below 1 Ω
    M1-6 (LSSR) - Body ground
    		Always
    		10 kΩ or higher
    M1-9 (E) - Body ground
    		Always
    		Below 1 Ω
    for RHD: 
    Tester Connection
    		Condition
    		Specified Condition
    M1-5 (LSSR) - 2D-25
    		Always
    		Below 1 Ω
    M1-5 (LSSR) - Body ground
    		Always
    		10 kΩ or higher
    M1-6 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Remove the instrument panel junction block assembly (Click here).

  1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.



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


    E173023E04


    Text in Illustration 
    *a
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)
    		*b
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2D-25 - A-5 (LSWL)
    		Always
    		Below 1 Ω
    2D-25 - Body ground
    		Always
    		10 kΩ or higher



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (Click here)
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)  

9.INSPECT REAR DOOR LOCK ASSEMBLY RH

  1. Inspect the rear door lock assembly RH (Click here).

    OK:
    Rear door lock assembly RH is normal.



NG
REPLACE REAR DOOR LOCK ASSEMBLY RH (Click here)
OK


10.CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY RH - MAIN BODY ECU AND BODY GROUND)

  1. Disconnect the L1 rear door lock assembly RH connector.

  1. Disconnect the H17 main body ECU (multiplex network body ECU) connector.

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

    Standard Resistance:
    for LHD: 
    Tester Connection
    		Condition
    		Specified Condition
    L1-6 (LSSR) - H17-2 (LSWR)
    		Always
    		Below 1 Ω
    L1-6 (LSSR) - Body ground
    		Always
    		10 kΩ or higher
    L1-9 (E) - Body ground
    		Always
    		Below 1 Ω
    for RHD: 
    Tester Connection
    		Condition
    		Specified Condition
    L1-9 (LSSR) - H17-2 (LSWR)
    		Always
    		Below 1 Ω
    L1-9 (LSSR) - Body ground
    		Always
    		10 kΩ or higher
    L1-10 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)