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

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.
   

2. 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)

1. Disconnect the rear door lock assembly LH connector.

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

3. 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)