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
  
  Fig 1: Service Check Mode And Detailed Information Mode Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "3" to change to "Detailed Information Mode"
3. Identify the component shown by the sub-code
  HINT
  - "190 (radio receiver)" is the component shown by the subcode in the example shown in the illustration.
  - For details of the DTC display, refer to DTC CHECK / CLEAR (See )

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 TABLE

Component	Proceed to
Integration control & panel assembly (1D8)	Integration control & panel assembly power source circuit (See INTEGRATION CONTROL AND PANEL ASSEMBLY POWER SOURCE CIRCUIT )
Stereo component amplifier (440)	Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
Radio receiver (190)	Radio receiver power source circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT )

INSPECT RADIO RECEIVER

Disconnect the radio receiver connectors

Fig 2: Identifying Radio Receiver Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
J66-5 (ATX+) - J66-15 (ATX-)	Always	60 to 80 Ω
J65-9 (TXM+) - J65-10 (TXM-)	Always	60 to 80 Ω
J63-9 (TX+) - J63-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER (See REMOVAL )

OK: Go to next step

CHECK HARNESS AND CONNECTOR (GATEWAY 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 (See )
1. Referring to AVC-LAN Wiring Diagram below, check the AVC-LAN circuit between the gateway ECU and the component shown by the sub-code.
  1. Disconnect all connectors between the gateway ECU and the component shown by sub-code
  2. Check for an open or short in the AVC-LAN circuit between the gateway 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 GATEWAY ECU (See NETWORK GATEWAY ECU )

OK: END