Illumination Circuit

LIGHTING: LIGHTING SYSTEM: Illumination Circuit
- Illumination Circuit

DESCRIPTION

The main body ECU receives information regarding the door courtesy switch and door lock position switch, and turns on the room light assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (ILLUMINATED ENTRY SYSTEM)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Turn the tester switch on.

(d) Turn the room light switch to the DOOR position.

(e) All doors closed (Courtesy light switches OFF).

(f) Select the following menus: Body Electrical / Main Body / Active Test / Illuminated Entry System.

(g) Check the room light while operating the main body ECU using the tester.

Main Body (Main Body ECU)

OK:

The illuminated entry system operates normally when operating it through the Techstream.

NG -- INSPECT FUSE (DOME)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT FUSE (DOME)

(a) Remove the DOME fuse from the engine room relay block.

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

Standard resistance:

(c) Reinstall the DOME fuse.

NG -- REPLACE FUSE Locations
OK -- Continue to next step.

3. INSPECT ROOM LIGHT ASSEMBLY

(a) Remove the room light assembly Removal.

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

Standard resistance:

(d) Reinstall the room light assembly.

NG -- REPLACE ROOM LIGHT ASSEMBLY Removal
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (BATTERY - ROOM LIGHT ASSEMBLY AND MAIN BODY ECU)

(a) Disconnect the 4K main body ECU connector.

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

Standard voltage:

(c) Reconnect the main body ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU