AVC-LAN Circuit (TO 12/2010): Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER ASSEMBLY

Disconnect the radio receiver assembly connectors.

Fig 1: Identifying Radio Receiver Assembly Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

FOR 12 SPEAKERS

Tester Connection	Condition	Specified Condition
E31-5 (ATX+) - E31-15 (ATX-)	Always	60 to 80 Ω
E35-9 (TXM+) - E35-10 (TXM-)	Always	60 to 80 Ω

FOR 9 SPEAKERS

Tester Connection	Condition	Specified Condition
E35-9 (TXM+) - E35-10 (TXM-)	Always	60 to 80 Ω

TEXT IN ILLUSTRATION

*A	for 12 Speakers
*a	Component without harness connected (Radio Receiver Assembly)

NG → See step 4

OK: Go to next step

CHECK HARNESS AND CONNECTOR
HINT:

For details of the connectors, refer to Terminals of ECU. Refer to TERMINALS OF ECU .
1. Referring to the following AVC-LAN wiring diagram, 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.
    
    Fig 2: Identifying AVC-LAN Circuits Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE RADIO RECEIVER ASSEMBLY. Refer to REMOVAL
INSPECT MALFUNCTIONING PARTS
1. Disconnect and reconnect each slave unit one by one until the master unit returns to normal operation.
  HINT:
  - Check all slave units.
  - When disconnecting a slave unit causes the master unit to return to normal operation, this indicates that the slave unit is malfunctioning. Replace the malfunctioning slave unit.
  OK
  
  Master unit returns to normal operation.
NG → See step 3

OK → REPLACE MALFUNCTIONING PARTS