Lexus ES: AVC-LAN Circuit
DESCRIPTION
Each unit of the navigation system connected to the AVC-LAN (communication bus) transmits switch signals via AVC-LAN communication.
If a short to +B or short to ground occurs in the AVC-LAN, the navigation system will not function normally because communication is not possible.
WIRING DIAGRAM
.png)
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 Navigation System.
Click here
.gif)
-
When replacing the radio receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio receiver assembly may not operate normally.
HINT:
The radio receiver assembly is the master unit.
PROCEDURE
| 1. | INSPECT RADIO RECEIVER ASSEMBLY |
(a) Remove the radio receiver assembly.
Click here
| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
.png)
| NG | .gif) | REPLACE RADIO RECEIVER ASSEMBLY |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT) |
(a) Disconnect the G5 radio receiver assembly connector.
(b) Disconnect the G22 multi-display assembly connector.
(c) Disconnect the G23 air conditioning control assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G5-5 (TX1+) - G22-7 (TX+) | Always | Below 1 Ω |
| G5-6 (TX1-) - G22-19 (TX-) | Always | Below 1 Ω |
| G5-5 (TX1+) or G22-7 (TX+) - Body ground | Always | 10 kΩ or higher |
| G5-6 (TX1-) or- G22-19 (TX-) - Body ground | Always | 10 kΩ or higher |
| G22-6 (TX1+) - G23-1 (TX1+) | Always | Below 1 Ω |
| G22-18 (TX1-) - G23-2 (TX1-) | Always | Below 1 Ω |
| G22-6 (TX1+) or G23-1 (TX1+) - Body ground | Always | 10 kΩ or higher |
| G22-18 (TX1-) or G23-2 (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 return to normal.
| OK | | REPLACE MALFUNCTIONING PARTS |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
READ NEXT:
Stereo Component Amplifier Malfunction (B15A3)
DESCRIPTION This DTC is stored when a malfunction occurs in the stereo component amplifier assembly. DTC No. Detection Item DTC Detection Condition Trouble Area B15A3 Stereo Component A
Display Malfunction (B15A6,B15B0)
DESCRIPTION These DTCs are stored when a malfunction occurs in the multi-display assembly. DTC No. Detection Item DTC Detection Condition Trouble Area B15A6 Display Malfunction When a
Navigation Processor Malfunction (B15AD)
DESCRIPTION This DTC is stored when a malfunction occurs in the navigation ECU. DTC No. Detection Item DTC Detection Condition Trouble Area B15AD Navigation Processor Malfunction When
SEE MORE:
BSM Buzzer Sound Request Signal Malfunction (C2A5C)
DESCRIPTION This DTC is stored when the rear television camera assembly receives an invalid communication signal from the blind spot monitor sensor RH. DTC No. Detection Item DTC Detection Condition Trouble Area C2A5C BSM Buzzer Sound Request Signal Malfunction An invalid communicat
Components
COMPONENTS ILLUSTRATION *1 COURTESY LIGHT ASSEMBLY *2 REAR DOOR ILLUMINATION LIGHT (REAR DOOR OUTSIDE HANDLE ASSEMBLY) *3 REAR DOOR SERVICE HOLE COVER *4 REAR DOOR TRIM BOARD SUB-ASSEMBLY *5 REAR DOOR TRIM UPPER PAD *6 REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY WITH RE
