Front Door Courtesy Switch Circuit

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: Front Door Courtesy Switch Circuit
- Front Door Courtesy Switch Circuit

DESCRIPTION

The multiplex network body ECU detects the door open or closed status based on signals from the front door courtesy light switches, and operates the automatic lock and door ajar warning functions.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Start the inspection from step 1 when using the Techstream and start from step 2 when not using the Techstream.

PROCEDURE

1. READ VALUE ON TECHSTREAM (FRONT DOOR COURTESY LIGHT SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch on (IG) and turn the Techstream main switch on.

(c) Select the items below in the "DATA LIST" and read the display on the Techstream.

BODY:





OK:

When each front door is opened/closed, the display will change as shown above.

NG -- INSPECT MULTIPLEX NETWORK BODY ECU (D, PCTY TERMINALS)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. INSPECT MULTIPLEX NETWORK BODY ECU (D, PCTY TERMINALS)

(a) Turn the ignition switch off.





(b) Disconnect the multiplex network body ECU (D6, D8) connectors.

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

Resistance:





NG -- INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

3. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY

(a) Remove the front door courtesy light switch.





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

Resistance:





NG -- REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BETWEEN MULTIPLEX NETWORK BODY ECU, BODY GROUND - FRONT DOOR)