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
Radio receiver (190)	RADIO RECEIVER POWER SOURCE CIRCUIT
Stereo component amplifier (440)	STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
Gateway ECU (1C6)	GATEWAY ECU 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 (MULTI-DISPLAY - COMPONENT SHOWN BY SUBCODE)
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 multi-display 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 multi-display and the component shown by the sub-code.
  2. Check for an open or short in the AVC-LAN circuit between the multi-display 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 SOB-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 MULTI-DISPLAY

OK: END