Inspection Procedure

1. Refer to the MULTI-DISPLAY POWER SOURCE CIRCUIT  .

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

1. for 9 Speaker System;

   Disconnect the R5 and R6 receiver connectors.

2. for 6 Speaker System:

   Disconnect the R5 receiver connector.

3. Measure the resistance of the receiver.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   R5-9 (TX1+) - R5-10 (TX1-)*1	60 to 80 Ω
   R5-9 (TX+) - R5-10(TX-)*2	60 to 80 Ω
   R6-5 (TX+) - R6-15 (TX-)*2	60 to 80 Ω
   HINT: *1: for 6 speaker system *2: for 9 speaker system

NG: REPLACE RADIO RECEIVER 

Fig 1: Identifying R5 And R6 Receiver Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Enter the diagnostic mode.
2. Press the "LAN Mon" switch to change to "LAN Monitor" Mode.
3. identify the component which has stored this code.

   Component table 

   COMPONENT DISPLAY
   
   

   Display	Component
   G/W	Gateway ECU
   DSP-AMP	Stereo component amplifier
   AUDIO H/U	Radio Receiver
   HINT: "G/W" is the component which has stored this code in the example shown in the illustration.

   Fig 2: Identifying Component Shown By Sub-Code

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 multi-display and the component which has stored this code.
   1. Disconnect all connectors between the multi-display and the component which has stored this code.
   2. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this code.

      OK: 

      There is no open or short circuit. 

      Fig 3: Audio And Visual System AVC-LAN - Circuit Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Replace the multi-display 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