Inspection Procedure

1. Enter the diagnostic mode.
   Fig 1: Example Of Service Check Mode And Detailed Information Mode

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2. Press the preset switch "3" 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 Fig 1 .
   • For details of the DTC display, refer to "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: 

   POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE
   
   

   Component	Proceed to
   Radio receiver (190)	RADIO RECEIVER POWER SOURCE CIRCUIT

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 2: Inspecting Radio Receiver

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NG: REPLACE RADIO RECEIVER 

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 below, check the AVC-LAN circuit between the stereo component amplifier and the component shown by the sub-code.
   1. Disconnect all connectors between the stereo component amplifier and the component shown by sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the stereo component amplifier and the component shown by the sub-code.

      OK: 

      There is no open or short circuit. 

      Fig 3: AVC-LAN Wiring Diagram

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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 STEREO COMPONENT AMPLIFIER 

OK: END