Driver Side Door UNLOCK Detection Switch Circuit

DESCRIPTION

The driver's door unlock detection switch is built into the driver's door lock assembly. The switch turns on when the driver's door is locked and turns off when the door is unlocked.
The multiplex network master switch assembly is connected to the driver's door lock assembly via terminal LSW and driver's door lock/unlock state signals are input to the multiplex network master switch assembly.
The multiplex network master switch assembly applies voltage to the door unlock detection switch via terminal LSW. When the door unlock detection switch is on (there is continuity between the switch terminals), a lock state signal is input to the multiplex network master switch assembly. When the switch is off (there is no continuity between the switch terminals), an unlock state signal is input.
The multiplex network master switch assembly sends driver's door lock/unlock state information to the main body ECU RH using multiplex communication.

WIRING DIAGRAM

INSPECTION PROCEDURE

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

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

   MASTER SW (Multiplex Network Master Switch Assembly): 

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   Door Unlock Detection SW	Driver side door unlock detection switch signal /ON or OFF	ON: Driver side door is unlocked OFF: Driver side door is locked	-

   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 FRONT DOOR LOCK ASSEMBLY (DOOR UNLOCK DETECTION SWITCH)

1. LHD Models:

   1. Remove the front 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
      7 - 8	Battery positive (+) → Terminal 4 Battery negative (-) → Terminal 3	Lock	10 kΩ or higher
      7 - 8	Battery positive (+) → Terminal 3 Battery negative (-) → Terminal 4	Unlock	Below 1 Ω

2. RHD Models:
   

   1. Remove the front door lock assembly RH.

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

      Standard resistance:

      Tester Connection	Measurement Condition	Door Lock Condition	Specified Condition
      7 - 8 (*1)	Battery positive (+) → Terminal 2 Battery negative (-) → Terminal 1	Lock	10 kΩ or higher
      7 - 8 (*1)	Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 2	Unlock	Below 1 Ω
      7 - 8 (*2)	Battery positive (+) → Terminal 4 Battery negative (-) → Terminal 1	Lock	10 kΩ or higher
      7 - 8 (*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 FRONT DOOR LOCK ASSEMBLY

OK

3. CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH)

1. Disconnect the front door lock assembly connector.

2. Disconnect the multiplex network master switch assembly connector.

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

   Standard resistance:

   Tester Connection (Symbols)	Condition	Specified Condition
   M2-8 (LSSR) - M7-16 (LSW) (*1)	Always	Below 1 Ω
   M2-7 (E) - Body ground (*1)	Always	Below 1 Ω
   L8-7 (LSSR) - L17-16 (LSW) (*2)	Always	Below 1 Ω
   L8-8 (E) - Body ground (*2)	Always	Below 1 Ω

   *1: LHD Models*2: RHD Models

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY