Light Control Switch Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Light Control Switch Circuit
- Light Control Switch Circuit

DESCRIPTION

The main body ECU receives the following switch information:

* Light control switch position off, tail, head or AUTO

* Dimmer switch position high, low or high flash (pass)

* Fog light switch position on or off

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





OK:

Normal conditions listed above are displayed.

NG -- INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

HINT
Inspect the items that did not change as a result of monitoring the Data List.

(a) Remove the headlight dimmer switch assembly Removal.





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

Standard Resistance:

Light Control Switch





Dimmer Switch





Fog Light Switch





Text in Illustration





NG -- REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - HEADLIGHT DIMMER SWITCH ASSEMBLY)

(a) Disconnect the D19 headlight dimmer switch assembly connector.

(b) Disconnect the D13 main body ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU Removal