| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000262LH |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): AVC-LAN Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
AVC-LAN Circuit |
DESCRIPTION
The audio and visual system communicates with each device via AVC-LAN communication. If a malfunction such as a short in a communication line, short to +B or short to ground occurs in the AVC-LAN circuit, communication will stop and the audio and visual system will not operate correctly. The malfunctioning device can be identified if the system returns to normal when the malfunctioning device is disconnected from the AVC-LAN circuit.
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.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
HINT:
The radio and display receiver assembly is the master unit.
PROCEDURE
|
1. |
DEALER INSTALLED OPTIONAL DEVICES (AVC-LAN COMPATIBLE DEVICES) |
(a) Disconnect the connector of each dealer installed optional device (AVC-LAN compatible device) and check if the malfunction continues.
|
Result |
Proceed to |
|---|---|
|
No dealer installed optional devices are installed |
A |
|
The malfunction reoccurs |
|
|
The system returns to normal |
B |
| B |
|
REPLACE THE DEVICE (OR WIRE HARNESS) |
|
|
2. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
(a) Remove the radio and display receiver assembly.
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT) |
(a) Disconnect the I175 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+) - I175-1 (TX1+) |
Always |
Below 1 Ω |
|
I68-7 (TX-) - I175-2 (TX1-) |
Always |
Below 1 Ω |
|
I68-8 (TX+) - Body ground |
Always |
10 kΩ or higher |
|
I68-7 (TX-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (AVC-LAN VOLTAGE) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I175-1 (TX1+) - I175-2 (TX1-) |
Ignition Switch ACC |
Approximately 0 V |
|
I175-1 (TX1+) - Body ground |
Ignition Switch ACC |
Approximately 2.5 V |
|
I175-2 (TX1-) - Body ground |
Ignition Switch ACC |
Approximately 2.5 V |
| OK |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
| NG |
|
CHECK HARNESS OR CONNECTOR |
|
|