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Inspection Procedure

IDENTIFY 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 ).
Fig 1: Display - LAN Mon Switch To LAN 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 SPECIFICATION

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 )
Television display (1F6)	Television display power source circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT )

INSPECT RADIO RECEIVER ASSEMBLY

Fig 2: Identifying F1 & F23 Receiver Connectors Terminals

G05630678

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the F1 and F23 receiver connectors.
Measure the resistance according to the value(s) in the table below.
Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
F1-5 (ATX+) - F1-15 (ATX-)	Always	60 to 80 Ω
F23-9 (TX+) - F23-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER ASSEMBLY (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 the AVC-LAN wiring diagram, 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 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 NAVIGATION ECU )

OK: END