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Inspection Procedure

IDENTIFY COMPONENT SHOWN BY SUB-CODE
1. Enter the diagnostic mode.
  
  Fig 1: Identifying Display Screen - Service Check Mode (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 example 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 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 L51 receiver connector.

Fig 2: Identifying Radio Receiver Assembly Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
L51-5(ATX+)-L51-15 (ATX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER ASSEMBLY (See REMOVAL )

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL 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 the "TERMINALS OF ECU " .
1. Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the integration control and panel assembly and the component shown by the subcode.
  1. Check for an open or short in the AVC-LAN circuit between the integration control and panel assembly and the component shown by the sub-code.
    OK: There is no open or short circuit.
    
    Fig 3: Identifying 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 INTEGRATION CONTROL AND PANEL ASSEMBLY (See REMOVAL )

OK: END