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.

NOTE: Be sure to read Description before performing the following procedures.

CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
Refer to RADIO RECEIVER POWER SOURCE CIRCUIT .

If the power source circuit is operating normally, proceed to the next step.

INSPECT RADIO RECEIVER

Disconnect the radio receiver connectors.

Fig 1: Identifying Radio Receiver Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
J66-5 (ATX+) - J66-15 (ATX-)	Always	60 to 80 Ω
J65-9 (TXM+) - J65-10 (TXM-)	Always	60 to 80 Ω
J63-9 (TX+) - J63-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER (See REMOVAL )

OK: Go to next step

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Fig 2: Service Check Mode And Detailed Information Mode Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Press the preset switch "3" to change to "Detailed Information Mode"

Identify the component which has stored this code

Component Table

COMPONENT TABLE

Component	Physical Address
Gateway ECU	1C6
Stereo component amplifier	440
Integration control & panel assembly	1D8

HINT

"440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration
For details of the DTC display, refer to DTC CHECK / CLEAR

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)
HINT

For details of the connectors, refer to TERMINALS OF ECU .
1. Referring to AVC-LAN Wiring Diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code
  1. Disconnect all connectors between the radio receiver and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code.
    OK: There are no open or short circuits.
    
    Fig 3: AVC-LAN - Wiring Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
REPLACE RADIO RECEIVER
1. Replace the radio receiver with a known good one and check if the same problem occurs again
  OK: Same problem does not occur.
NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK: END