Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

CHECK RADIO RECEIVER ASSEMBLY

Fig 1: Identifying Radio Receiver Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the R1, R2 and R3 receiver connectors.

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

Standard resistance

RADIO RECEIVER ASSEMBLY

Tester Connection	Condition	Specified Condition
R3-9 (TXM+) - R3-10 (TXM-)	Always	60 to 80 Ω
R1-5 (ATX+) - R1-15 (ATX-)	Always	60 to 80 Ω
R2-9 (TX+) - R2-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER ASSEMBLY

OK: Go to Next Step

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.
  
  Fig 2: Identifying AVC-LAN Wiring Diagram
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.
    
    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
    
    OK: PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE