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 motor. 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 motor 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) Check the Data List to ensure proper functioning of the unlock detection switch.

Main Body





OK:

The display is as specified in the normal condition column.

NG -- INSPECT FRONT DOOR LOCK MOTOR ASSEMBLY LH (UNLOCK DETECTION SWITCH)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT FRONT DOOR LOCK MOTOR ASSEMBLY LH (UNLOCK DETECTION SWITCH)





(a) Remove the front door lock motor LH.

for Double Cab: Removal

for Regular Cab: Removal

for CrewMax: Removal

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

Standard resistance:





Result





D -- REPLACE FRONT DOOR LOCK MOTOR ASSEMBLY LH Removal

C -- REPLACE FRONT DOOR LOCK MOTOR ASSEMBLY LH Removal

B -- REPLACE FRONT DOOR LOCK MOTOR ASSEMBLY LH Removal
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK MOTOR LH - MAIN BODY ECU AND BODY GROUND)





(a) Disconnect the N4 door lock connector.

(b) Disconnect the J4 ECU connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU