Toyota RAV4 manuals

Toyota Sienna Service Manual: AVC-LAN Circuit

DESCRIPTION

Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.

When a short to +B or short to ground occurs in this AVC-LAN, the navigation system will not function normally as the communication is discontinued.

INSPECTION PROCEDURE

1 INSPECT RADIO AND NAVIGATION ASSEMBLY

INSPECT RADIO AND NAVIGATION ASSEMBLY

  1. Disconnect the radio and navigation assembly connectors.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

2 CHECK HARNESS AND CONNECTOR

HINT: For details of the connectors, refer to "TERMINALS OF ECU".

  1.  Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.
  1.  Check for an open or short in all AVC-LAN circuits.

CHECK HARNESS AND CONNECTOR

OK: There is no open or short circuit.

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Mute Signal Circuit between Radio and Navigation Assembly and Stereo Component Amplifier
DESCRIPTION This circuit sends a signal to the stereo component amplifier to mute noise. Because of that, the noise produced by changing the sound source ceases. If there is an open in the circ ...

Reverse Signal Circuit
DESCRIPTION The radio and navigation assembly receives a reverse signal from the park/neutral position switch and information about the GPS antenna, and then adjusts vehicle position. WIRING DIAG ...

Other materials:

Components
REMOVAL 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 2. REMOVE FRONT BUMPER ASSEMBLY 3. REMOVE FOG LIGHT ASSEMBLY  Disengage the 2 claws  Disengage the 2 pins and remove the fog light assembly. DISASSEMBLY 1. REMOVE FOG LIGHT BULB  Turn in the dir ...

Data list / active test
HINT: By accessing the DATA LIST displayed on the intelligent tester, you can perform such functions as reading the values of switches and sensors without removing any parts. Reading the DATA LIST as the first step in troubleshooting is one method to shorten labor time. 1. DATA LIST FOR CENTER ...

Transmission Error
DTC 01-DC Transmission Error DESCRIPTION   HINT: *1: This code may be stored if the engine is started, idled for 60 seconds and then started again. NOTICE:  Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT ...

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