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
   Stereo component amplifier (440)	STEREO COMPONENT AMPLIFIER 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 radio receiver and the component shown by the sub-code.
   1. Disconnect all connectors between the radio receiver and the component shown by the sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the radio receiver 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 RADIO RECEIVER 

OK: END