Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER

Disconnect the radio receiver connectors

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
J66-5 (ATX+) - J66-15(ATX-)	Always	60 to 80 Ω
J63-9 (TX+) - J63-10(TX-)	Always	60 to 80 Ω

Fig 1: Identifying Connector Terminals Of Radio Receiver

NG: REPLACE RADIO RECEIVER (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR
HINT.

For details of the connectors, refer to TERMINALS OF ECU
1. Referring to 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 are no open or short circuits.
    
    Fig 2: AVC-LAN - Wiring Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step
INSPECT MALFUNCTIONING PARTS
1. Disconnect each slave unit one by one to check if the master unit returns to normal operation If the master unit does not return to normal operation, reconnect the disconnected slave unit and then check the other slave units
  OK: Master unit returns to normal operation.
  
  HINT:
  - Check all slave units.
  - If the master unit returns to normal operation after disconnecting a slave unit, there is a short in the slave unit. Therefore, replace the slave unit.
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

OK: REPLACE MALFUNCTIONING PARTS