Toyota RAV4 manuals

Toyota Sienna Service Manual: AVC-LAN Circuit

DESCRIPTION

Each unit of the audio 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 audio system will not function normally as the communication is discontinued.

INSPECTION PROCEDURE

1 INSPECT RADIO RECEIVER

 INSPECT RADIO RECEIVER

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

Standard resistance

Standard resistance

*1: 10 Speaker System

2 CHECK HARNESS AND CONNECTOR

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

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

OK: There is no open or short circuit

CHECK HARNESS AND CONNECTOR

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Mute Signal Circuit between Radio Receiver and Television Display Assembly
DESCRIPTION The radio receiver controls the volume according to the MUTE signal from the television display assembly. The MUTE signal is sent to reduce noise and a popping sound generated when ...

Vehicle Speed Signal Circuit between Multi-display and Combination Meter
DESCRIPTION This circuit is necessary for the ASL (Auto Sound Leveliser) built into the radio receiver. Speed signals are received from the combination meter and used for the ASL. The ASL fun ...

Other materials:

Fail-safe chart
1. FAIL-SAFE This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid. (a) ATF (Automatic Transmission Fluid) temperature sensor: When the ATF temperature sensor has a malfunction, 5th upshift is prohibited. (b) Counter gear speed sensor NC ...

Occupant Classification ECU Malfunction
DTC B1795 Occupant Classification ECU Malfunction DESCRIPTION DTC B1795 is recorded when a malfunction is detected in the occupant classification ECU. Troubleshoot DTC B1771 first when the DTCs B1771 and B1795 are output simultaneously. WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK DTC ...

Initialization
HINT:  The seatback position is initialized at the factory before shipment, so initialization is not normally required. There is an initialization function for cases when reinitialization is required.  Before performing initialization procedure and initialization release step ...

В© 2011-2021 Copyright www.tsienna.net