Door Courtesy Switch Circuit

LIGHTING: LIGHTING SYSTEM: Door Courtesy Switch Circuit

Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU detects the condition of the door courtesy switch.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the display on the Techstream.

Main Body (Main Body ECU)





OK:
Condition sign can be displayed.
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.
2. INSPECT COURTESY LIGHT SWITCH





(a) Remove the door courtesy light switch.
(b) Measure the resistance of the switch.
Standard resistance:
Front LH, Front RH, Rear LH, Rear RH, Back Door






NG -- REPLACE DOOR COURTESY LIGHT SWITCH
OK -- Continue to next step.
3. CHECK WIRE HARNESS (MAIN BODY ECU - COURTESY LIGHT SWITCH)





(a) Connect the courtesy light switch.
(b) Disconnect the IA, IC and ID instrument panel junction block connectors.
(c) Disconnect the E15 main body ECU connector.
(d) Measure the resistance of the wire harness side connectors.
Standard resistance:
Front door LH
Front door RH
Rear door RH
Rear door LH
Back door






















NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)