Toyota Camry (XV70): 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.*
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- *: w/ Smart Key System
PROCEDURE
|
1. | PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(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 |
|---|---|---|---|
|
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 - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the 3F instrument panel junction block assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
3F-1 - Body ground | Always |
11 to 14 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
*a | Component without harness connected (Instrument Panel Junction Block Assembly) |
- | - |
(a) Remove the instrument panel junction block assembly.
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(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
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(c) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
3D-19 - Battery negative terminal |
Battery positive (+) > 3F-1 Battery negative (-) > MB-23 (DOMR) |
11 to 14 V |
|
3B-10 - Battery negative terminal |
Battery positive (+) > 3F-1 Battery negative (-) > MB-23 (DOMR) |
11 to 14 V |
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
3F-1 - 3D-19 | Always |
10 k? or higher |
|
3F-1 - 3B-10 | Always |
10 k? or higher |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG | | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
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SEE MORE:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Before performing troubleshooting for the dynamic radar cruise control system, perform troubleshooting for the pre-collision system.
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*: Use the Techstream.
PROCEDURE
1. VEHICLE BROUGHT TO WORKSHOP
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Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the GTS to the DLC3.
(b) Turn the ignition switch to ON. (c) Turn the intuitive parking assist system on.
(d) Turn the GTS on. (e) Enter the following menus: Body Electrical / Clearance Warning / Trouble Codes.
(f) Check for DTCs. Body Electrical > Cl
