Inspection Procedure

1. Refer to the RADIO RECEIVER POWER SOURCE CIRCUIT  .

   If the power source circuit is operating normally, proceed to the next step.

1. Disconnect the L51 and L57 receiver connectors.
   Fig 1: Identifying Radio Receiver Assembly Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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
   L57-9 (TX+)-L57-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER ASSEMBLY (See  REMOVAL   ) 

OK: GO TO NEXT STEP 

1. Enter the diagnostic mode.
   Fig 2: Identifying Display Screen - Service Check Mode (Example)

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2. Press the preset switch "2" to change to "Detailed Information Mode".
3. Identify the component which has stored this code.

   Component table 

   COMPONENT CHART
   
   

   Component	Physical address
   Stereo component amplifier	440
   Integration control and panel assembly	1C4

   HINT:

   • "440 (Stereo component amplifier)" is the component which has stored this code in the example shown in the illustration.
   • For details of the DTC display, refer to the "DTC CHECK / CLEAR " .

HINT:

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 radio receiver and the component which has stored this code.
   1. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this 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 

1. Replace the radio receiver with a normal one and check if the same problem occurs again (see REMOVAL  ).

   OK: Same problem does not occur. 

NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

OK: END