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 body ECU 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 operation of the door unlock detection switch.

   Multiplex Network Master Switch Assembly 

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

   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 FRONT DOOR LOCK ASSEMBLY (DOOR UNLOCK DETECTION SWITCH)

1. LHD Models:
   Remove the front door lock assembly LH.

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

2. RHD Models:Remove the front door lock assembly RH.

   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	7 to 8 (10 kΩ or higher)
      Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 2	Unlock	7 to 8 (Below 1 Ω)

NG	REPLACE FRONT DOOR LOCK ASSEMBLY

OK

3. CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - P/W REGULATOR MASTER SWITCH)

1. LHD Models:Disconnect the front door lock assembly connector.

   1. Disconnect the power window regulator master switch assembly connector.

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      D10-8 (LSSR) - P19-16 (LSW)	Always	Below 1 Ω
      D10-7 (E) - Body ground	Always	Below 1 Ω

2. RHD Models:Disconnect the front door lock assembly connector.

   1. Disconnect the power window regulator master switch assembly connector.

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

      Standard resistance:

      Tester Connection	Condition	Specified Condition
      D10-7 (LSSR) - P19-16 (LSW)	Always	Below 1 Ω
      D10-8 (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