POWER DOOR LOCK CONTROL SYSTEM > Door Control Switch Circuit

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DESCRIPTION

When the lock side of the door control switch is pressed, continuity is established between terminals 3 and 2 of the switch. When the unlock side of the switch is pressed, continuity is established between terminals 1 and 2.
Terminals L1 and UL1 of the body ECU are connected to the door control switch and door lock/unlock request signals (by door control switch operation) are input to the ECU.
The body ECU constantly applies voltage to terminal 3 of the door control switch via terminal L1. When the door control switch is operated to lock all doors, current flows from terminal L1 to terminal 3. The body ECU determines that this is door lock request signal input.
The body ECU also applies constant voltage to terminal 1 of the door control switch via terminal UL1.
When the door control switch is operated to unlock the doors, current flows from terminal UL1 to terminal 1. The body ECU determines that this is door unlock request signal input.

WIRING DIAGRAM


B111715E01


INSPECTION PROCEDURE

1.READ VALUE OF DATA LIST (FRONT PASSENGER SIDE DOOR CONTROL SWITCH ASSEBLY)

  1. Check the DATA LIST to ensure proper operation of the front passenger door lock switch.

    Body ECU 
    Item
    		Measurement Item /
    Display (Range)
    		Normal Condition
    		Diagnostic Note
    Door Lock SW-Lock
    		Door lock switch signal
    /ON or OFF
    		ON: Door lock switch is pushed to LOCK position
    OFF: Door lock switch is not pushed to LOCK position
    		-
    Door Lock SW-Unlock
    		Door unlock switch signal
    /ON or OFF
    		ON: Door lock switch is pushed to UNLOCK position
    OFF: Door lock switch is not pushed to UNLOCK position
    		-

    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 DOOR CONTROL SWITCH ASSEMBLY


    B066161E02

  1. Remove the door control switch assembly.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 (LOCK) - 2
    		Lock
    		Below 1 Ω
    3 (LOCK) - 2
    1 (UNLOCK) - 2
    		OFF (Free)
    		10 kΩ or higher
    1 (UNLOCK) - 2
    		Unlock
    		Below 1 Ω



NG
REPLACE DOOR CONTROL SWITCH ASSEMBLY
OK


3.CHECK WIRE HARNESS (DOOR CONTROL SWITCH ASSEMBLY - INSTRUMENT PANEL J/B)


    B111706E05

  1. LHD Models:
    Disconnect the door control switch assembly connector.

    1. Disconnect the instrument panel J/B connector.

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

      Standard resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D12-3 - 1J-3
      		Always
      		Below 1 Ω
      D12-1 - 1J-4
      		Always
      		Below 1 Ω
      D12-2 - Body ground
      		Always
      		Below 1 Ω



    B111716E01

  1. RHD Models:
    Disconnect the door control switch assembly connector.

    1. Disconnect the instrument panel J/B connector.

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

      Standard resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D11-3 - 1K-15
      		Always
      		Below 1 Ω
      D11-1 - 1K-12
      		Always
      		Below 1 Ω
      D11-2 - Body ground
      		Always
      		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE