DESCRIPTION The main body ECU (multiplex network body ECU) controls the operation of the following lights:
- Map Light (Roof Console Box Sub-assembly)
- Spot Light Assembly
WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here 
HINT: The
DOME CUT relay supplies power to the interior lights. If all the lights
that use power from the DOME CUT relay do not turn on, check the
interior light auto cut circuit first. Click here
PROCEDURE
| 1. |
PERFORM ACTIVE TEST USING TECHSTREAM | (a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG). (c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) Perform the Active Test according to the display on the Techstream. Body Electrical > Main Body > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
Illuminated Entry System |
Turns on the lights that are controlled by the illuminated entry system* |
OFF or ON | Perform
the Active Test with the door linked switch of the map light (roof
console box sub-assembly) on and switches of the spot light assembly LH
and RH off. |
- *: Refer to System Description for the lights that are controlled by the illuminated entry system.
Click here
Body Electrical > Main Body > Active Test
|
Tester Display | | Illuminated Entry System |
OK: All lights that are controlled by the illuminated entry system come on.
| OK |
 | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
NG |
 | |
| 2. |
INSPECT MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY) |
(a) Remove the map light (roof console box sub-assembly). Click here
(b) Inspect the map light (roof console box sub-assembly).
Click here
| NG |
| REPLACE MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY) |
|
OK | |
| |
| 3. |
INSPECT SPOT LIGHT ASSEMBLY | (a) Remove the spot light assembly.
Click here (b) Inspect the spot light assembly.
Click here
| NG |
| REPLACE SPOT LIGHT ASSEMBLY |
|
OK | |
| |
| 4. |
CHECK HARNESS AND CONNECTOR (MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY) - SPOT LIGHT ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: w/o Sliding Roof |
Tester Connection | Condition |
Specified Condition | |
O9-10 (+B1) - O8-5 (B) |
Always | Below 1 Ω | |
O9-2 (RLMP) - O8-2 (CTY) |
Always | Below 1 Ω | |
O9-10 (+B1) or O8-5 (B) - Body ground |
Always | 10 kΩ or higher | |
O9-2 (RLMP) or O8-2 (CTY) - Body ground |
Always | 10 kΩ or higher | w/ Sliding Roof |
Tester Connection | Condition |
Specified Condition | |
O10-14 (+B1) - O8-5 (B) |
Always | Below 1 Ω | |
O10-2 (RLMP) - O8-2 (CTY) |
Always | Below 1 Ω | |
O10-14 (+B1) or O8-5 (B) - Body ground |
Always | 10 kΩ or higher | |
O10-2 (RLMP) or O8-2 (CTY) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 5. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY)) |
(a) Disconnect the 4D instrument panel junction block assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: w/o Sliding Roof |
Tester Connection | Condition |
Specified Condition | |
4D-10 - O9-10 (+B1) | Always |
Below 1 Ω | |
4D-29 - O9-1 (DOOR) | Always |
Below 1 Ω | |
4D-10 or O9-10 (+B1) - Body ground |
Always | 10 kΩ or higher | |
4D-29 or O9-1 (DOOR) - Body ground |
Always | 10 kΩ or higher | w/ Sliding Roof |
Tester Connection | Condition |
Specified Condition | |
4D-10 - O10-14 (+B1) |
Always | Below 1 Ω | |
4D-29 - O10-1 (DOOR) |
Always | Below 1 Ω | |
4D-10 or O10-14 (+B1) - Body ground |
Always | 10 kΩ or higher | |
4D-29 or O10-1 (DOOR) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 6. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
*a | Component without harness connected
(Instrument Panel Junction Block Assembly) |
- | - |
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
4D-29 - MB-1 (ILE) | Always |
Below 1 Ω |
| OK |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG |
| REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY | | 
