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:
* Personal Light*1
* Rear Interior Light
HINT
The LIGHT CUT relay supplies power to the lights not controlled by the illuminated entry system. If all the lights that use power from the LIGHT CUT relay do not turn on, check the LIGHT CUT relay circuit first Interior Lighting System.
* *1: w/ Sliding Roof
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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
*1: w/o Sliding Roof
*2: w/ Sliding Roof
OK:
Each light fades in.
Result
B -- CHECK HARNESS AND CONNECTOR (LIGHT CUT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
C -- INSPECT ROOF CONSOLE BOX ASSEMBLY
A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Interior Lighting System
2. CHECK HARNESS AND CONNECTOR (LIGHT CUT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
(a) Disconnect the 3B instrument panel junction block assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
HINT
Perform the check under the following conditions:
* No. 1 room light assembly switch in DOOR position
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. 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.
(c) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal
OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
4. INSPECT ROOF CONSOLE BOX ASSEMBLY
(a) Remove the roof console box assembly Removal.
(b) Inspect the roof console box assembly Component Tests and General Diagnostics.
OK:
Roof console box assembly is normal.
NG -- REPLACE ROOF CONSOLE BOX ASSEMBLY Removal
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (LIGHT CUT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
(a) Install the roof console box assembly Installation.
(b) Disconnect the 3B instrument panel junction block assembly connector.
(c) Measure the voltage according to the value(s) in the table below.
HINT
Perform the check under the following conditions:
* Interior light door switch on
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. 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.
(c) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal
OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal