Rear Door Unlock Detection Switch Circuit

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Rear Door UNLOCK Detection Switch Circuit

Rear Door UNLOCK Detection Switch Circuit

DESCRIPTION

The rear door unlock detection switch is built into the rear door lock. The switch turns on when the rear door is unlocked and turns off when the door is locked. The main body ECU is connected to the rear door lock via terminal LSR and rear 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 LSR. When the door unlock detection switch is off (there is no continuity between the switch terminals), a lock state signal is input to the main body ECU. When the switch is on (there is continuity between the switch terminals), an unlock state signal is input.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (UNLOCK DETECTION SWITCH)
(a) Check the Data List to ensure proper functioning of the unlock detection switch.
(1) Intelligent tester

MAIN BODY





(2) Techstream

Main Body





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





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





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





(a) Disconnect the G4 (LH side) or F4 (RH side) door lock connector.
(b) Disconnect the C45 main body ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (LH side):






Standard resistance (RH side):





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