Up to 08/2009

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

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the interior light door switch and interior light on/off switch.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE 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 / Data List.

(e) Read the display on the Techstream.

Body (Main Body ECU RH)





OK:

Switch condition can be displayed.

Result:





C -- INSPECT MAP LIGHT ASSEMBLY

B -- INSPECT MAP LIGHT ASSEMBLY

A -- INSPECT MAP LIGHT ASSEMBLY

D -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2. INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly Components.





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

Standard Resistance:





Text in Illustration





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

3. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the T10 map light assembly connector.





(b) Disconnect the F14 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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

4. INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly Components.





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

Standard Resistance:





Text in Illustration





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

5. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the map light assembly connector.





(b) Disconnect the main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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

6. INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly Components.





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

Standard Resistance:





Text in Illustration





NG -- REPLACE MAP LIGHT ASSEMBLY Components

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MAP LIGHT ASSEMBLY - BODY GROUND)