Power Door Lock Control System Rear Door Unlock Detection Switch Lh Circuit

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Door Lock. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF DATA LIST (UNLOCK DETECTION SWITCH)

INSPECT REAR DOOR LOCK ASSEMBLY (UNLOCK DETECTION SWITCH)

CHECK WIRE HARNESS (REAR DOOR LOCK ASSEMBLY - MAIN BODY ECU RH)

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


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 main body ECU RH 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 main body ECU RH 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


Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Power Door Lock Control System Rear Door Unlock Detection Switch Lh Circuit


INSPECTION PROCEDURE

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

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

    BODY (Main Body ECU):
    Item
    		Measurement Item /
    Display (Range)
    		Normal Condition
    		Diagnostic Note
    Rear Lock Position Switch
    		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 column.


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 LH.


    Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Power Door Lock Control System Rear Door Unlock Detection Switch Lh Circuit

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

    Standard resistance:
    Tester Connection
    		Measurement Condition
    		Door Lock Condition
    		(Specified Condition)
    6 - 9 (*1)
    		Battery positive (+) → Terminal 2
    Battery negative (-) → Terminal 1
    		Lock
    		10 kΩ or higher
    6 - 9 (*1)
    		Battery positive (+) → Terminal 1
    Battery negative (-) → Terminal 2
    		Unlock
    		Below 1 Ω
    6 - 9 (*2)
    		Battery positive (+) → Terminal 4
    Battery negative (-) → Terminal 1
    		Lock
    		10 kΩ or higher
    6 - 9 (*2)
    		Battery positive (+) → Terminal 1
    Battery negative (-) → Terminal 4
    		Unlock
    		Below 1 Ω
    *1: w/ Double locking system
    *2: w/o Double locking system


NG
REPLACE REAR DOOR LOCK ASSEMBLY
OK


3.CHECK WIRE HARNESS (REAR DOOR LOCK ASSEMBLY - MAIN BODY ECU RH)


    Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Power Door Lock Control System Rear Door Unlock Detection Switch Lh Circuit

  1. Disconnect the rear door lock assembly LH connector.

  1. Disconnect the ECU (cowl side J/B RH) connector.

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

    Standard resistance:
    Tester Connection
    (Symbols)
    		Condition
    		Specified Condition
    O8-5 (LSSR) - RA-2 (*1)
    		Always
    		Below 1 Ω
    O8-6 (E) - Body ground (*1)
    		Always
    		Below 1 Ω
    O8-6 (LSSR) - RA-2 (*2)
    		Always
    		Below 1 Ω
    O8-9 (E) - Body ground (*2)
    		Always
    		Below 1 Ω
    *1: w/ Double locking system
    *2: w/o Double locking system


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)