| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001HI84 |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 11/2022] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): AVC-LAN Circuit; 2020 - 2023 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 11/2022] | ||
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AVC-LAN Circuit |
DESCRIPTION
Each unit of the audio and visual system connected to the AVC-LAN (communication bus) transmits signals via AVC-LAN communication.
If a short to +B or short to ground occurs in an AVC-LAN communication line, the audio and visual system will not function normally because communication is not possible.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
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![2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
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When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
HINT:
The radio and display receiver assembly is the master unit.
PROCEDURE
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1. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
(a) Remove the radio and display receiver assembly.
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(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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| NG |
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REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
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2. |
CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT) |
(a) Disconnect the I55 radio and display receiver assembly connector.
(b) Disconnect the I68 stereo component amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I68-8 (TX+) - I55-5 (TX1+) |
Always |
Below 1 Ω |
|
I68-7 (TX-) - I55-6 (TX1-) |
Always |
Below 1 Ω |
|
I68-8 (TX+) or I55-5 (TX1+) - Body ground |
Always |
10 kΩ or higher |
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I68-7 (TX-) or I55-6 (TX1-) - Body ground |
Always |
10 kΩ or higher |
| NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR |
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3. |
INSPECT MALFUNCTIONING PARTS |
(a) Disconnect and reconnect each slave unit one by one until the master unit returns to normal.
HINT:
- Check all slave units.
- If disconnecting a slave unit causes the master unit to return to normal, the slave unit is defective and should be replaced.
OK:
Master unit returns to normal.
| OK |
|
REPLACE MALFUNCTIONING PARTS |
| NG |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
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