POWER DOOR LOCK CONTROL SYSTEM > All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder

for Preparation Click here


DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the multiplex network master switch assembly and driver door key lock and unlock switch signals from the front door lock assembly (for Driver door). The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM


B275911E01


B275911E02


INSPECTION PROCEDURE

1.CHECK DOOR LOCK OPERATION

  1. Check door lock operation (Click here).

    Result:
    Result
    		Proceed to
    All doors cannot be locked through multiplex network master switch
    		A
    All doors cannot be locked through driver door key cylinder
    		B



B
Go to step 5
A


2.CHECK DTC OUTPUT (LIN COMMUNICATION SYSTEM)

  1. Clear the DTC (Click here).

  1. Recheck for DTCs.

    OK:
    DTC B1206 is not output.



NG
GO TO LIN COMMUNICATION SYSTEM (DTC B1206) (Click here)
OK


3.REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

  1. Replace the multiplex network master switch assembly (Click here).


NEXT


4.CHECK DOOR LOCK OPERATION

  1. Check that all doors can be locked and unlocked by using the multiplex network master switch (Click here).

    OK:
    All doors can be locked and unlocked with the multiplex network master switch.



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

END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE) 

5.READ VALUE USING INTELLIGENT TESTER (DOOR KEY-LINKED LOCK AND UNLOCK SWITCH)

  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 Data List according to the display on the intelligent tester.

    Main Body (Main Body ECU (Multiplex Network Body ECU)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Door Key SW-Lock
    		Driver door key-linked lock/unlock switch lock signal/ON or OFF
    		ON: Driver door key cylinder turned to lock position
    OFF: Driver door key cylinder not turned to lock position
    		-
    D Door Key SW-UL
    		Driver door key-linked lock/unlock switch unlock signal/ON or OFF
    		ON: Driver door key cylinder turned to unlock position
    OFF: Driver door key cylinder not turned to unlock position
    		-

    OK:
    The intelligent tester indicates ON or OFF according to the key cylinder operation shown in the table.



NG
Go to step 6
OK

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

6.INSPECT FRONT DOOR LOCK ASSEMBLY (for DRIVER DOOR) (DOOR KEY-LINKED LOCK AND UNLOCK SWITCH)

  1. Remove the front door lock assembly (for driver door) (Click here).



  1. for LHD



      B273324E02

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      9 (L) - 7 (E)
      		Locked
      		Below 1 Ω
      9 (L) - 7 (E)
      		off
      		10 kΩ or higher
      10 (UL) - 7 (E)
      		Unlocked
      		Below 1 Ω
      10 (UL) - 7 (E)
      		off
      		10 kΩ or higher

      Text in Illustration 
      *a
      		Component without harness connected
      (Front Door Lock Assembly (for Driver door))
      *b
      		Lock
      *c
      		Unlock



  1. for RHD (w/ Double Locking System)



      B259282E03

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      6 (L) - 8 (E)
      		Locked
      		Below 1 Ω
      6 (L) - 8 (E)
      		off
      		10 kΩ or higher
      5 (UL) - 8 (E)
      		Unlocked
      		Below 1 Ω
      5 (UL) - 8 (E)
      		off
      		10 kΩ or higher

      Text in Illustration 
      *a
      		Component without harness connected
      (Front Door Lock Assembly (for Driver door))
      *b
      		Lock
      *c
      		Unlock



NG
REPLACE FRONT DOOR LOCK ASSEMBLY (for DRIVER DOOR) (Click here)
OK


7.CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

  1. Disconnect the 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
    K3-9 (L) - H16-11 (L2)
    		Always
    		Below 1 Ω
    K3-10 (UL) - H16-24 (UL3)
    		Always
    		Below 1 Ω
    K3-7 (E) - Body ground
    		Always
    		Below 1 Ω
    H16-11 (L2) - Body ground
    		Always
    		10 kΩ or higher
    H16-24 (UL3) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    J3-6 (L) - H16-11 (L2)
    		Always
    		Below 1 Ω
    J3-5 (UL) - H16-24 (UL3)
    		Always
    		Below 1 Ω
    J3-8 (E) - Body ground
    		Always
    		Below 1 Ω
    H16-11 (L2) - Body ground
    		Always
    		10 kΩ or higher
    H16-24 (UL3) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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