Toyota Camry (XV70): Ambient Illumination Light Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the instrument panel ambient illumination light (instrument panel 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.*
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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 |
|---|---|---|---|
|
Interior Illumination Light1 |
Instrument panel ambient illumination light (Instrument panel light assembly) |
OFF or ON | Preconditions for using the Active Test to check dimmer controlled illumination:
|
|
Tester Display |
|---|
| Interior Illumination Light1 |
OK:
Instrument panel ambient illumination light comes on.
| OK | .gif) | USE SIMULATION METHOD TO CHECK
|
|
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| 2. |
INSPECT INSTRUMENT PANEL LIGHT ASSEMBLY |
(a) Remove the instrument panel ambient illumination light (instrument panel light assembly).
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(b) Inspect the instrument panel ambient illumination light (instrument panel light assembly).
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| NG | | REPLACE INSTRUMENT PANEL AMBIENT ILLUMINATION LIGHT (INSTRUMENT PANEL LIGHT ASSEMBLY) |
|
| 3. |
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 |
|
| 4. |
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
*a | Component without harness connected (Instrument Panel Junction Block Assembly) |
- | - |
(a) Disconnect the 3B instrument panel junction block assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
3B-24 - 3F-1 | Always |
Below 1 ? |
| NG | | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|
| 5. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL LIGHT ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
3B-24 - K89-2 (B) | Always |
Below 1 ? |
|
3B-24 or K89-2 (B) - Body ground |
Always | 10 k? or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL LIGHT ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the K53 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
K89-1 (E) - K53-20 (LED1) |
Always | Below 1 ? |
|
K89-1 (E) or K53-20 (LED1) - Body ground |
Always | 10 k? or higher |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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