Inspection Procedure
WARNING: This page is about a different car, the 2007 Lexus GX 470. 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 the radio receiver power source circuit (See RADIO RECEIVER COMMUNICATION ERROR
).
If the power source circuit is operating normally, proceed to the next step.
- Refer to the radio receiver power source circuit (See RADIO RECEIVER COMMUNICATION ERROR
).
- INSPECT RADIO RECEIVER ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the R1 and R3 receiver connectors.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RADIO RECEIVER ASSEMBLYTester Connection Condition Specified Condition R1-5 (ATX+) - R1-15 (ATX-) Always 60 to 80 Ω R3-9 (TX+) - R3-10 (TX-) Always 60 to 80 Ω
NG: REPLACE RADIO RECEIVER ASSEMBLY
OK: Go To Next Step
- IDENTIFY COMPONENT WHICH HAS STORED THIS CODE
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Enter the diagnostic mode.
- Press the preset switch "2" to change to "Detailed Information Mode".
- Identify the component which has stored this code.
Component table
COMPONENT WHICH HAS STORED THIS CODEComponent Physical address Stereo component amplifier 440 Television display assembly* 1F6 HINT: - *: w/ Rear seat entertainment system
- "440 (Stereo component amplifier)" is the component which has stored this code in the example shown.
- 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 .
- 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.
- 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.
- Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go To Next Step
- 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.
- INSPECT RADIO RECEIVER ASSEMBLY
- 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
- Replace the radio receiver with a normal one and check if the same problem occurs again.