Driver Side Door UNLOCK Detection Switch Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the tester on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the Data List according to the display on the tester.
   MAIN BODY:
   
   

   Tester Display	Measurement Item/ Range	Normal Condition	Diagnostic Note
   D-Door Lock Pos SW	Door unlock detection switch signal / ON or OFF	ON: Door is unlocked OFF: Door is locked	-

   OK

   On the tester screen, each item changes between ON and OFF according to the chart above.

NG → See step   2 

OK → PROCEED TO  PROBLEM SYMPTOMS TABLE   NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Remove the front door lock assembly LH.
   Fig 1: Inspecting Front Door Lock Assembly LH (Door Lock Motor) & Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the door unlock detection switch.

   Resistance

   Tester Condition	Door Lock Condition	Specified Condition
   Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 4	ON (Door lock set to UNLOCK)	7 - 8 (Below 1 Ω)
   Battery positive (+) → Terminal 4 Battery negative (-) → Terminal 1	OFF (Door Lock set to LOCK)	7 - 8 (10 kΩ or higher)

NG → REPLACE FRONT DOOR LOCK ASSEMBLY LH 

OK: Go to next step 

1. Disconnect the D8 and H9 connectors.
   Fig 2: Identifying Front Door Lock LH And Instrument Panel J/B Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the wire harness side connectors.

   Resistance

   Tester Connection	Condition	Specified Condition
   D8-7 (LSWD) - H9-8	Always	Below 1 Ω
   H9-7 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO  PROBLEM SYMPTOMS TABLE   NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE