Inspection Procedure

IDENTIFY TRANSMITTER CORRESPONDING TO DTC
1. Enter the diagnostic mode.
  
  Fig 1: Service Check Mode Diagnosis Procedure (Example)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "2" 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 examples shown in the illustration.
  - For details of the DTC display, refer to the "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 ASSEMBLY

Disconnect the E62 receiver connector.

Measure the resistance of the receiver.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E62-5 (ATX+) - E62-15 (ATX-)	60 to 80 Ω

Fig 2: Identifying E62 Receiver Connector Terminals

G04491241

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER ASSEMBLY

OK: Go TO NEXT STEP.

CHECK WIRE HARNESS
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 radio receiver and the component shown by the sub-code.
  1. 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 AND CONNECTOR

OK: Go TO NEXT STEP.
REPAIR 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