Toyota Corolla Cross: Interior Light Auto Cut Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls operation of the DOME CUT relay in order to supply power to the interior lights. When the battery saving function operates while the interior lights are on, the main body ECU (multiplex network body ECU) opens the DOME CUT 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 procedure.
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1
for HEV Model: Click here
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for Gasoline Model: Click here
- *1: w/ Smart Key System
PROCEDURE
|
1. | PERFORM ACTIVE TEST USING GTS |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
Relay for Interior Light Auto Cut Function |
DOME CUT relay | OFF or ON |
When performing this Active Test, turn all the interior lights on.
|
|
Tester Display |
|---|
| Relay for Interior Light Auto Cut Function |
OK:
All of the interior lights turn off when ON is selected.
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE - POWER DISTRIBUTION BOX ASSEMBLY) |
(a) Disconnect the 8F power distribution box assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8F-20 - Body ground | Ignition switch off |
11 to 14 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. |
REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
(a) Replace the fold power distribution box assembly with a new or known good one.
Click here
|
| 4. |
PERFORM ACTIVE TEST USING GTS |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
Relay for Interior Light Auto Cut Function |
DOME CUT relay | OFF or ON |
When performing this Active Test, turn all the interior lights on.
|
|
Tester Display |
|---|
| Relay for Interior Light Auto Cut Function |
OK:
All of the interior lights turn off when ON is selected.
| OK | | END (POWER DISTRIBUTION BOX ASSEMBLY WAS DEFECTIVE) |
| NG | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
