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.

NOTE: Be sure to read Description before performing the following procedures.

CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT
Refer to MULTI-DISPLAY POWER SOURCE CIRCUIT

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

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 1: Identifying Connector Terminals Of Radio Receiver

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER (See REMOVAL )

OK: Go to Next Step

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode
Press the "LAN Mon" switch to change to "LAN Monitor" mode

Identify the component which has stored this code.

Component Table

COMPONENT REFERENCE

Display	Component
AUDIO H/U	Radio receiver
DSP-AMP	Stereo component amplifier
G/W	Gateway ECU
NAVI	Navigation ECU

HINT.

"NAVI" is the component which has stored this code in the example shown in the illustration.

Fig 2: Diagnosis Display - Lan Monitor Screen

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT WHICH HAS STORED THIS CODE)
HINT.

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 multi-display and the component which has stored this code.
  1. Disconnect all connectors between the multi-display and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this 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
CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER)
HINT:

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 multi-display and the radio receiver
  1. Disconnect all connectors between the multi-display and the radio receiver
  2. Check for an open or short in the AVC-LAN circuit between the multi-display and the radio receiver
    OK: There are no open or short circuits.
    
    Fig 4: AVC-LAN - Wiring Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step
REPLACE MULTI-DISPLAY
1. Replace the multi-display with a known good 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