POWER DOOR LOCK CONTROL SYSTEM > Rear Door UNLOCK Detection Switch LH Circuit

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DESCRIPTION

The rear left side door unlock detection switch is built into the rear left side door lock assembly. The switch turns on when the rear left side door is locked and turns off when the door is unlocked.
The body ECU is connected to the rear left side door lock assembly via terminal LSWL and rear left side door lock/unlock state signals are input to the ECU.
The body ECU applies voltage to the door unlock detection switch via terminal LSWL. When the door unlock detection switch is on (there is continuity between the switch terminals), a lock state signal is input to the ECU. When the switch is off (there is no continuity between the switch terminals), an unlock state signal is input.

WIRING DIAGRAM


B109775E03


INSPECTION PROCEDURE

1.READ VALUE OF DATA LIST (UNLOCK DETECTION SWITCH)

  1. Check the DATA LIST to ensure proper operation of the door unlock detection switch.

    Body ECU 
    Item
    		Measurement Item /
    Display (Range)
    		Normal Condition
    		Diagnostic Note
    Rear Lock Position SW
    		Rear door lock position switch signal
    /ON or OFF
    		ON: Rear door lock is in UNLOCK position
    OFF: Rear door lock is in LOCK 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 REAR DOOR LOCK ASSEMBLY (UNLOCK DETECTION SWITCH)


  1. Remove the rear door lock assembly.


    B112742E01

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

    Standard resistance:
    Measurement Condition
    		Door Lock Condition
    		Specified Condition
    Battery positive (+) → Terminal 2
    Battery negative (-) → Terminal 1
    		Lock
    		5 to 6 (10 kΩ or higher)
    Battery positive (+) → Terminal 1
    Battery negative (-) → Terminal 2
    		Unlock
    		5 to 6 (Below 1 Ω)



NG
REPLACE REAR DOOR LOCK ASSEMBLY
OK


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


    B111700E04

  1. Disconnect the rear 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
    D14-5 (LSSR) - 1P-5
    		Always
    		Below 1 Ω
    D14-6 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE