Inspection Procedure

1. Enter the diagnostic mode.
   Fig 1: DTC - Flow Chart

   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 " .

1. 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
   
   

   Component	Proceed to
   Radio receiver (190)	Radio receiver power source circuit
   Stereo component amplifier (440)	Stereo component amplifier power source circuit

1. Disconnect the L51 receiver connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

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

   Fig 2: Identifying L51 Receiver Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE RADIO RECEIVER ASSEMBLY (See  REMOVAL   ) 

   OK: Go to Next Step 

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: AVC-LAN Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

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