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.

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 in the example shown in the illustration.
  - The sub-code will be indicated by its physical address
  - For the component list, refer to Diagnosis Display Detailed Description in the System Description (See SYSTEM DESCRIPTION ).
    
    Fig 1: Diagnosis Display Screen - Lam Monitor Mode
    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 REFERENCE

Component	Proceed to
Radio receiver (190)	Radio receiver power source circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT )
Stereo component amplifier (440)	Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
Multi-display (110)	Multi-display power source circuit (See MULTI-DISPLAY POWER SOURCE CIRCUIT )
Gateway ECU (1C6)	Gateway ECU power source circuit (See GATEWAY ECU 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

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

Fig 2: Identifying Connector Terminals Of Radio Receiver

NG: REPLACE RADIO RECEIVER (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - 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 AVC-LAN Wiring Diagram below, check the AVC-LAN circuit between the navigation ECU and the component shown by the sub-code
  1. Disconnect all connectors between the navigation ECU and the component shown by sub-code.
  2. Check for an open or short in the AVC-LAN circuit between the navigation ECU and the component shown by the sub-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 COMPONENT SHOWN BY SUB-CODE
1. Replace the component shown by the sub-code with a known good one and check if the same problem occurs again.
  OK: Same problem does not occur.
NG: REPLACE NAVIGATION ECU (See REMOVAL )

OK: END