Toyota Corolla Cross: 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.
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PROCEDURE
|
1. |
REMOVE 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 | .gif)
|
REPLACE THE DEVICE (OR WIRE HARNESS) |
|
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|
2. |
INSPECT RADIO & DISPLAY RECEIVER ASSEMBLY (TX1+, TX1-) |
(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:
|
|
| NG |
|
REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY |
|
|
3. |
CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT) |
(a) Disconnect the I253 radio and display receiver assembly connector.
(b) Disconnect the I234 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 |
|---|---|---|
|
I253-1 (TX1+) - I234-8 (TX+) |
Always |
Below 1 Ω |
|
I253-2 (TX1-) - I234-7 (TX-) |
Always |
Below 1 Ω |
|
I253-1 (TX1+) or I234-8 (TX+) - Body ground |
Always |
10 kΩ or higher |
|
I253-2 (TX1-) or I234-7 (TX-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK AVC-LAN COMPATIBLE DEVICES (DISCONNECT CONNECTOR) |
(a) Disconnect the connector of each AVC-LAN connected device and check if the malfunction continues.
|
Result |
Proceed to |
|---|---|
|
The malfunction continues |
A |
|
The system returns to normal (AVC-LAN connected device was malfunctioning) |
B |
| B |
|
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY |
|
|
5. |
INSPECT RADIO & DISPLAY RECEIVER ASSEMBLY (AVC-LAN VOLTAGE) |
|
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |
|
REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY |
| NG |
|
REPAIR OR REPLACE HARNESS OR MALFUNCTIONING AVC-LAN CONNECTED DEVICE |
READ NEXT:
Microphone Circuit
WIRING DIAGRAM
w/ Telematics Transceiver
w/o Telematics Transceiver
CAUTION / NOTICE / HINT
NOTICE:
When replacing the telematics transceiver, make sure to replace it with
a new one.
My Settings cannot be Used on the Multi-display
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection
or maintenance, performing initialization, registration or calibration may be needed.
Click here
Bluetooth Connection History
CAUTION / NOTICE / HINT
HINT:
Check that the following conditions of the "Bluetooth" device being
used by the customer are met.
Operation of the "Bluetooth" device has been
SEE MORE:
Installation
INSTALLATION
CAUTION / NOTICE / HINT
COMPONENTS (INSTALLATION)
Procedure
Part Name Code
1
TRANSMISSION OIL COOLER
33493C
-
-
2
NO. 2 WATER BY-PAS
Precaution
PRECAUTION NOTICE: When disassembling the headlight assembly, use static electricity countermeasures SST (desktop anti-static mat set) and observe all precautions to prevent damage to the system by electrostatic discharge (ESD).
STATIC ELECTRICITY COUNTERMEASURES SST SST: Desktop anti-static mat se
