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.

IDENTIFY THE COMPONENT SHOWN BY SUB-CODE
1. Enter the diagnostic mode.
2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
3. Identify the component shown by the sub-code.
  HINT:
  - "110 (multi-display)" is the component shown by the sub-code.
  - The sub-code will be indicated by its physical address.
  - For the component list, refer to DIAGNOSIS DISPLAY DETAILED DESCRIPTION .
    
    Fig 1: Identifying Diagnostic Tool Display - LAN Mon
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

Inspect the power source circuit of the component shown by the sub-code.

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

Component Table:

COMPONENT DISPLAY TABLE

Component	Proceed to
Gateway ECU (1C6)	GATEWAY ECU POWER SOURCE CIRCUIT
Stereo component amplifier (440)	STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
Multi-display (110)	MULTI-DISPLAY POWER SOURCE CIRCUIT
Navigation ECU (178)	NAVIGATION ECU POWER SOURCE CIRCUIT
Television display assembly (1BO)	TELEVISION DISPLAY POWER SOURCE CIRCUIT

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 REFERENCE TABLE

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

Fig 2: Identifying Radio Receiver Connector Terminals

NG: REPLACE RADIO RECEIVER

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT SHOWN BY SUB-CODE)
HINT:
- Start the check from the circuit that is near the component shown by the sub-code first.
- 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 shown by the sub-code.
  
  Fig 3: Identifying AVC-LAN Wiring Diagram
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Disconnect all connectors between the radio receiver and the component shown by the subcode.
  2. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component shown by the sub-code.
    OK:
    
    There is no open or short circuit.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step
REPLACE COMPONENT SHOWN BY SUB-CODE
1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.
  OK:
  
  Same problem does not occur.
NG: REPLACE RADIO RECEIVER

OK: END