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Inspection Procedure

IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE
1. Enter the diagnostic mode.
  
  Fig 1: Diagnostic Mode For Television Display Assembly Communication Error
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "3" to change to "Detailed Information Mode".
3. Identify the component shown by the sub-code.
  HINT:
  - "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration.
  - For details of the DTC display, refer to "DTC CHECK / CLEAR ".

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
Radio receiver (190)	RADIO RECEIVER POWER SOURCE CIRCUIT
Stereo component amplifier (440)	STEREO COMPONENT AMPLIFIER 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

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection

Condition

Specified Condition

ATX+ (R7-5) - ATX- (R7-15) (⁽¹⁾)

Always

60 to 80 Ω

TXM+ (R8-9)-TXM-(R8-10)

Always

60 to 80 Ω

⁽¹⁾	10 Speaker System

Fig 2: Identifying R7 And R8 Radio Receiver Connectors Terminal

G05141106

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY 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 the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the television display assembly and the component shown by the sub-code.
  1. Disconnect all connectors between the television display assembly and the component shown by sub-code.
  2. Check for an open or short in the AVC-LAN circuit between the television display assembly 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, LICENSE AGREEMENT TMS1002
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 TELEVISION DISPLAY ASSEMBLY

OK: END