Interior Light Circuit

LIGHTING (INT): LIGHTING SYSTEM: Interior Light Circuit
- Interior Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the following lights:

* Map light assembly

* No. 1 room light assembly

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* Inspect fuses for circuits related to this system before performing the following inspection procedure.
* Check that the light intensity of the light control rheostat is set to maximum.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Check that the lights operate.

Main Body

OK:

Each light fades in.

NG -- CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - MAP LIGHT ASSEMBLY)

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

2. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - MAP LIGHT ASSEMBLY)

(a) Disconnect the U3 map light assembly connector.

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

Standard Voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly Removal.

(b) Inspect the map light assembly Component Tests and General Diagnostics.

OK:

Map light assembly is normal.

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

4. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 2A instrument panel junction block assembly connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly Removal.

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly Removal.

Text in Illustration

NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal