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'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

PROCEDURE

1. READ VALUE OF DATA LIST (DOOR UNLOCK DETECTION SWITCH)
(a) Check the Data List to ensure proper function of the door unlock detection switch.

MASTER SW (Multiplex Network Master Switch Assembly):





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





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






NG -- REPLACE FRONT DOOR LOCK ASSEMBLY
OK -- Continue to next step.
3. CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH)





(a) Disconnect the front door lock assembly connector.
(b) Disconnect the multiplex network master switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE