DESCRIPTION
The main body ECU (multiplex network body ECU) controls operation of the DOME relay in order to supply power to the interior lights. When battery saving control operates while the interior lights are on, the main body ECU (multiplex network body ECU) opens the DOME relay to turn off the lights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
CHECK SYMPTOMS |
(a) Check symptoms.
Result
Result |
Proceed to |
---|---|
All the interior lights that receive power via the DOME relay do not illuminate. |
A |
Battery saving function does not operate. |
B |
B |
GO TO STEP 4 |
|
2. |
INSPECT DOME RELAY |
(a) Remove the DOME relay from the engine room relay block, junction block.
(b) Inspect the DOME relay (See page ).
NG |
REPLACE DOME RELAY |
|
3. |
CHECK HARNESS AND CONNECTOR (DOME FUSE - DOME RELAY) |
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Using the Techstream, perform the Active Test (See page ).
HINT:
In the Active Test, check the interior light operating state.
Main Body
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Relay for Interior Light Auto Cut Function |
DOME relay |
ON/OFF |
- |
OK:
Battery saving control operates.
HINT:
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
5. |
INSPECT DOME RELAY |
(a) Remove the DOME relay from the engine room relay block, junction block.
(b) Inspect the DOME relay (See page ).
NG |
REPLACE DOME RELAY |
|
6. |
CHECK HARNESS AND CONNECTOR (DOME RELAY - MAIN BODY ECU, BODY GROUND) |
(a) Remove the Main body ECU (See page ).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
DOME relay terminal 2 - F9-2 (DOMR) |
Always |
Below 1 Ω |
DOME relay terminal 1 - Body ground |
Always |
Below 1 Ω |
F9-2 (DOMR) - Body ground |
Always |
10 kΩ or higher |
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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