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 which has stored this 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 details of the DTC display, refer to "DIAGNOSIS DISPLAY DETAILED DESCRIPTION " .
    
    Fig 1: Identifying Component Shown By Sub-Code
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NEXT

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 CHART

Component	Proceed to
Gateway ECU (1C6)	GATEWAY ECU POWER SOURCE CIRCUIT
Stereo component amplifier (440)	STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
Radio Receiver (190)	RADIO RECEIVER POWER SOURCE CIRCUIT

NEXT

INSPECT RADIO RECEIVER

for 9 Speaker System:
Disconnect the R5 and R6 receiver connectors.
for 6 Speaker System:
Disconnect the R5 receiver connector.

Measure the resistance of the receiver.

Standard resistance

RESISTANCE AND RECEIVER CONDITION SPECIFICATION

Tester Connection	Specified Condition
R5--9 (TX1+) - R5--10 (TX1-)^* 1	60 to 80 Ω
R5--9 (TX+) - R5--10 (TX-)^* 2	60 to 80 Ω
R6-5 (TX+) - R6--15 (TX-)^* 2	60 to 80 Ω

HINT:

^* 1: for 6 speaker system
^* 2: for 9 speaker system

NG : REPLACE RADIO RECEIVER

Fig 2: Inspecting Radio Receiver

G04476400

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP

CHECK WIRE HARNESS (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 the "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 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: Multi-Display Communication Error - AVC-LAN Wiring Diagram
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG : REPAIR OR REPLACE HARNESS AND 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 : GO TO NEXT STEP

END