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. Enter the diagnostic mode.
   Fig 1: Service Check Mode Diagnosis Procedure

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "3" to change to "Detailed Information Mode".
3. Identify the component which has stored this code.

   Component table 

   COMPONENT REFERENCE CHART
   
   

   Component	Physical address
   Stereo component amplifier	440
   Television display assembly	1B0

   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 ".

1. Inspect the power source circuit of the component which has stored this code.

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

   Component table 

   COMPONENT REFERENCE CHART
   
   

   Component	Proceed to
   Stereo component amplifier	Stereo component amplifier power source circuit
   Television display assembly	Television display assembly power source circuit

1. Disconnect the E62 and E64* receiver connectors.
2. Measure the resistance of the receiver.
   Fig 2: Identifying E64 & E62 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E62-5 (ATX+) - E62-15 (ATX-)	60 to 80 Ω
   E64-9 (TXM+) - E64-10 (TXM-)*	60 to 80 Ω

   HINT:

   *: w/Rear seat entertainment system

NG: REPLACE RADIO RECEIVER ASSEMBLY 

OK: Go TO NEXT STEP. 

HINT:

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 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: AVC-LAN - Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go TO NEXT STEP. 

1. Replace the component which has stored this code with a normal one and check if the same problem occurs again.

   OK: Same problem does not occur. 

NG: REPLACE RADIO RECEIVER ASSEMBLY 

OK: END