Back Door Unlock Detection Switch Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: Back Door UNLOCK Detection Switch Circuit

Back Door UNLOCK Detection Switch Circuit

DESCRIPTION

The back door unlock detection switch comes on when the back door key cylinder is turned to the unlock position with the key.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (BACK DOOR UNLOCK DETECTION SWITCH)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester main switch on.
(d) Select the item below in the Data List and read the display on tester.
Theft Warning ECU:






OK:
When the back door is locked, "ON" appears on the screen.
Theft Warning ECU:






OK:
When the back door is unlocked, "ON" appears on the screen.
HINT: The theft warning ECU detects the back door lock condition using signals from the back door unlock detection switch. The condition can be displayed as BACK DOOR LOCK or BACK DOOR UNLOCK on an Techstream by the theft warning ECU.

NG -- INSPECT BACK DOOR LOCK ACTUATOR ASSEMBLY (UNLOCK DETECTION SWITCH)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT BACK DOOR LOCK ACTUATOR ASSEMBLY (UNLOCK DETECTION SWITCH)
(a) Disconnect the N4 unlock detection switch connector.




(b) Measure the resistance.
Standard resistance:





(c) Reconnect the unlock detection switch connector.
NG -- REPLACE BACK DOOR LOCK ACTUATOR ASSEMBLY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - BACK DOOR LOCK ACTUATOR ASSY)
(a) Disconnect the D26 theft warning ECU and the N4 unlock detection switch connectors.




(b) Measure the resistance.
Standard resistance:





(c) Reconnect the theft warning ECU and the unlock detection switch connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ACTUATOR ASSEMBLY - BODY GROUND)
(a) Disconnect the N4 unlock detection switch connector.




(b) Measure the resistance.
Standard resistance:





(c) Reconnect the unlock detection switch connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE THEFT WARNING ECU ASSEMBLY