Inspection Procedure

Refer to RADIO RECEIVER POWER SOURCE CIRCUIT  .

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

1. Disconnect the radio receiver connectors.
   Fig 1: Identifying Radio Receiver Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J66-5 (ATX+) - J66-15 (ATX-)	Always	60 to 80 Ω
   J65-9 (TXM+) - J65-10 (TXM-)	Always	60 to 80 Ω
   J63-9 (TX+) - J63-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER  (See REMOVAL  )

OK: Go to next step 

1. Enter the diagnostic mode.
   Fig 2: Service Check Mode And Detailed Information Mode Chart

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2. Press the preset switch "3" to change to "Detailed Information Mode"
3. Identify the component which has stored this code

   Component Table 

   COMPONENT TABLE
   
   

   Component	Physical Address
   Gateway ECU	1C6
   Stereo component amplifier	440
   Integration control & panel assembly	1D8

   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 TERMINALS OF ECU  .

1. Referring to 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 are no open or short circuits. 

      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 known good 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