Inspection Procedure

Refer to the RADIO RECEIVER POWER SOURCE CIRCUIT  .

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

1. Disconnect the radio receiver connector.
2. Measure the resistance according to the value(s) in RADIO RECEIVER  .

   Standard resistance 

   RADIO RECEIVER
   
   

   Tester Connection	Condition	Specified Condition
   TX+ - TX-	Always	60 to 80 Ω

   Fig 1: Inspecting Radio Receiver

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER 

OK: GO TO NEXT STEP 

1. Enter the diagnostic mode.
   Fig 2: Entering Diagnostic Mode (Example)

   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/PHYSICAL ADDRESS
   
   

   Component	Physical address
   Stereo component amplifier	440

   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 "DTC CHECK / CLEAR ".

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. Disconnect all connectors between the radio receiver and the component which has stored this code.
   2. 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 OR CONNECTOR 

OK: GO TO NEXT STEP 

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

   OK: 

   Same problem does not occur. 

NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

OK: END