Driver Side Door Unlock Detection Switch Circuit

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Driver Side Door UNLOCK Detection Switch Circuit

Driver Side Door UNLOCK Detection Switch Circuit

DESCRIPTION

The driver side door unlock detection switch is built into the front driver's door lock. The switch turns on when the driver's door is unlocked and turns off when the door is locked. The main body ECU is connected to the front driver's door lock via terminal LSWD and driver's door lock/unlock state signals are input to the main body ECU. The main body ECU applies voltage to the door unlock detection switch via terminal LSWD. When the door unlock detection switch is off (there is continuity between the switch terminals), a lock state signal is input to the main body ECU. When the switch is on (there is no continuity between the switch terminals), an unlock state signal is input.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (UNLOCK DETECTION SWITCH)
(a) Connect a Techstream to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) According to the display on tester, read on the "Data List".

Main Body





OK:
The display is as specified in the normal condition column.
NG -- INSPECT FRONT DOOR LOCK LH (UNLOCK DETECTION SWITCH)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT FRONT DOOR LOCK LH (UNLOCK DETECTION SWITCH)





(a) Remove the front door lock LH Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Reinstall the front door lock LH Installation.
NG -- REPLACE FRONT DOOR LOCK LH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK LH - MAIN BODY ECU AND BODY GROUND)





(a) Disconnect the J4 front door lock LH connector.
(b) Disconnect the F38 main body ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(d) Reconnect the front door lock LH connector.
(e) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU