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.
Fig 1: Display Screen - Component Shown By Sub-Code
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 CHART

Component	Proceed to
Gateway ECU (1C6)	GATEWAY ECU POWER SOURCE CIRCUIT
Stereo component amplifier (440)	STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
Multi-display (110)	MULTI-DISPLAY POWER SOURCE CIRCUIT
Navigation ECU (178)	NAVIGATION ECU POWER SOURCE CIRCUIT
Radio receiver (190)	RADIO RECEIVER 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

RADIO RECEIVER

Tester connection

Condition

Specified condition

ATX+ (E12-5) - ATX- (E12-15) (⁽¹⁾)

Always

60 to 80 Ω

TX+ (E15-9) - TX- (E15-10)

Always

60 to 80 Ω

⁽¹⁾	for 12 Speaker System

Fig 2: Identifying Radio Receiver E12 And E15 Connectors Terminals

G05006388

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (CLOCK ASSEMBLY - 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 Fig 3, check the AVC-LAN circuit between the clock assembly and the component shown by the sub-code.
    1. Disconnect all connectors between the clock assembly and the component shown by sub-code.
    2. Check for an open or short in the AVC-LAN circuit between the clock assembly and the component shown by the sub-code.
      
      Fig 3: AVC - LAN Wiring Diagram
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      
      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 CLOCK ASSEMBLY

OK: END