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 light switches.
HINT:
- The main body ECU receives door courtesy light switch signals to control the illuminated entry system.
- When performing troubleshooting, inspect the switch that is related to the malfunction only. For example, if the illuminated entry system does not operate when opening the front passenger side door with the ignition switch off, inspect the front passenger side door courtesy light switch circuit only.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect an Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Select the following menus: Body Electrical / Main Body / Data List /
(e) According to the display on the tester, read the "Data List".

Main Body (Main Body ECU)





OK:
Normal conditions listed above are displayed.
NG -- INSPECT DOOR COURTESY LIGHT SWITCH ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT DOOR COURTESY LIGHT SWITCH ASSEMBLY
(a) Inspect the front door courtesy light switch Front Door Courtesy Switch, rear door courtesy light switch Rear Door Courtesy Switch, back door courtesy switch Back Door Courtesy Switch.
OK:
Door courtesy light switches are normal.
Result:






D -- REPLACE BACK DOOR LOCK ASSEMBLY
C -- REPLACE REAR DOOR COURTESY LIGHT SWITCH
B -- REPLACE FRONT DOOR COURTESY LIGHT SWITCH
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - DOOR COURTESY LIGHT SWITCH)





(a) Disconnect the 4A main body ECU connector.
(b) Disconnect each door courtesy light switch connector.
(c) Disconnect the O3 back door lock assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Front RH side






Front LH side






Rear RH side






Rear LH side






Back door





(e) Reconnect the main body ECU connector.
(f) Reconnect each door courtesy light switch connector.
(g) Reconnect the luggage compartment door lock assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU