Inspection Procedure

INSPECT RADIO RECEIVER

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

Standard resistance

RESISTANCE SPECIFICATION

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

NG: REPLACE RADIO RECEIVER

Fig 1: Disconnecting Radio Receiver Connectors

G05270857

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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.
  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: AVC-LAN Wiring Diagram
  Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE