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Inspection Procedure

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 " .
  Fig 1: Diagnostic Tool Display - System Check Mode And LAN Monitor Screen
  Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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
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 )
Gateway ECU (1C6)	Gateway ECU power source circuit (See Gateway ECU Power Source Circuit )
Navigation ECU (178)	(See NAVIGATION ECU POWER SOURCE CIRCUIT )
Television display assembly (1 B0)	Television display power source circuit (See 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

RESISTANCE SPECIFICATION

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

NG: REPLACE RADIO RECEIVER

Fig 2: Disconnecting Radio Receiver Connectors

G05270857

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: Go to next step

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - 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 below, check the AVC-LAN circuit between the multi-display and the component shown by the sub-code.
  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.
  Fig 3: AVC-LAN Wiring Diagram
  Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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 MULTI-DISPLAY

OK: END