Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

IDENTIFY THE COMPONENT SHOWN BY SUB-CODE
1. Enter the diagnostic mode.
  
  Fig 1: Identifying Display Screen - Radio Receiver Communication
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 Fig 1.
  - The sub-code will be indicated by its physical address.
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 TABLE CHART

Component	Proceed to
Gateway ECU (1C6)	Gateway ECU power source circuit (See GATEWAY ECU 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 )
Navigation ECU (178)	Navigation ECU power source circuit (See NAVIGATION ECU POWER SOURCE CIRCUIT )
Clock assembly (1D6)	Clock power source circuit (See CLOCK 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 SPECIFIED CONDITION

Tester Connection

Condition

Specified Condition

ATX+ (E12-5) - ATX- (E12-15) (⁽¹⁾)

Always

60 to 80

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

Always

60 to 80

⁽¹⁾	for 12 Speaker System

NG: REPLACE RADIO RECEIVER

Fig 2: Identifying Radio Receiver Connector Terminals

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - 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 radio receiver and the component shown by the sub-code.
  1. Disconnect all connectors between the radio receiver and the component shown by sub-code.
  2. Check for an open or short in the AVC-LAN circuit between the radio receiver 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 RADIO RECEIVER

OK: END