Audio And Visual System (W/O Navigation System) Stereo Component Amplifier Communication Error

INSPECTION PROCEDURE

IDENTIFY COMPONENT SHOWN BY SUB-CODE

CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

INSPECT RADIO RECEIVER ASSEMBLY

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - COMPONENT SHOWN BY SUB-CODE)

REPLACE COMPONENT SHOWN BY SUB-CODE

INSPECTION PROCEDURE

1. Enter diagnostic mode.
   

   
   
   
   

2. Press preset switch "2" to change the mode to "Detailed Information Mode".
   

3. Identify the component shown by the sub-code.
   

   HINT:

   1. "P190" set by the radio receiver assembly is shown in the preceding illustration as an example.
      
   2. For details of the DTC display, refer to DTC Check/Clear (Click here).
      

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	Proceed to
   Radio receiver assembly (190)	Radio receiver power source circuit (Click here)
   Multi-media interface ECU (388)	Multi-media interface ECU power source circuit (Click here)

1. Disconnect the F1 and F55 radio receiver assembly connectors.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   F1-5 (ATX+) - F1-15 (ATX-)	Always	60 to 80 Ω
   F55-9 (TXM+) - F55-10 (TXM-)	Always	60 to 80 Ω

   Text in Illustration

   *1	Component without harness connected (Radio Receiver Assembly)
   *2	Component without harness connected (Radio Receiver Assembly)

HINT:

1. Start the check from the circuit that is near the component shown by the sub-code first.
   
2. For details of the connectors, refer to Terminals of ECU (Click here).
   

1. Referring to the following AVC-LAN wiring diagram, check the AVC-LAN circuit between the stereo component amplifier assembly and the component shown by the sub-code.
   

   1. Disconnect all connectors between the stereo component amplifier assembly and component shown by the sub-code.
      

   
   
   

   2. Check for an open or short in the AVC-LAN circuit between the stereo component amplifier assembly and component shown by the sub-code.
      

      OK:

      There is no open or short circuit.
      

      
      
      
      

1. Replace the component shown by the sub-code with a known good one and check if the same problem occurs again.
   

   OK:

   Malfunction disappears.