Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. 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

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Condition	Specified Condition
ATX+ - ATX-	Always	60 to 80 Ω
TX+ - TX-	Always	60 to 80 Ω
TX+ - TX-	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER

OK: Go to Next step

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Fig 2: Identifying Diagnostic Flow Diagram
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
Television display assembly	1B0

HINT:

"440 (stereo component amplifier)" is the component which has stored this code in the example shown above.
For details of the DTC display, refer to the 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 the 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 is no open or short circuit.
    
    Fig 3: Identifying 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 normal 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