Toyota Camry (XV70): AVC-LAN Circuit
DESCRIPTION
Each unit of the navigation 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 navigation system will not function normally because communication is not possible.
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
HINT:
The radio and display receiver assembly is the master unit.
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 Navigation System.
Click here
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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.
PROCEDURE
|
1. | 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:
|
|
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| NG | .gif) | REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
|
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| 2. |
CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT) |
(a) Disconnect the K3 radio and display receiver assembly connector.
(b) Disconnect the K10 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 |
|---|---|---|
|
K10-8 (TX+) - K3-5 (TX1+) |
Always | Below 1 Ω |
|
K10-7 (TX-) - K3-6 (TX1-) |
Always | Below 1 Ω |
|
K10-8 (TX+) or K3-5 (TX1+) - Body ground |
Always | 10 kΩ or higher |
|
K10-7 (TX-) or K3-6 (TX1-) - Body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 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
|
READ NEXT:
Vehicle Speed Signal Circuit between Navigation ECU and Combination Meter
DESCRIPTION The navigation ECU receives a vehicle speed signal from the combination meter assembly.
HINT:
A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter
Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter
DESCRIPTION The stereo component amplifier assembly receives a vehicle speed signal from the combination meter assembly to control the ASL function.
HINT:
A voltage of 12 V or 5 V is output from
Reverse Signal Circuit
DESCRIPTION The radio and display receiver assembly receives a reverse signal from the BKUP LP relay. WIRING DIAGRAM
PROCEDURE
1.
CHECK BACK-UP LIGHT (a) Move the shift lever to R and
SEE MORE:
Lost Communication with Meter (B1324,B1325)
DESCRIPTION These DTCs are stored when communication between the radio and display receiver assembly and combination meter assembly or headup display (meter mirror sub-assembly)* is not possible.
DTC No. Detection Item
DTC Detection Condition Trouble Area
B1324 Lost Communic
Body
BODY TIGHTEN BOLTS AND NUTS ON CHASSIS AND BODY
(a) If necessary, tighten the bolts and nuts on the chassis parts listed below.
Front axle and suspension
Drivetrain
Rear axle and suspension
Brake system
Engine mounts
Other chassis parts
(b) If necessary, tighten the bo
