Inspection Procedure

CHECK RADIO RECEIVER ASSEMBLY

Disconnect the R1, R2 and R3 receiver connectors.

Fig 1: Identifying Radio Receiver Assembly
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Measure the resistance according to the value(s) in the table below.

Standard resistance

RADIO RECEIVER ASSEMBLY TABLE

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