Inspection Procedure

1. Enter the diagnostic mode.
2. Press the preset switch "2" 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 the illustration.
     Fig 1: Identifying Detailed Information Mode

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • For details of the DTC display, refer to the "DTC CHECK/CLEAR" (see 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 

1. Disconnect the L51 receiver connector.
2. Measure the resistance according to the value(s) in the table below.

Standard Resistance 

Fig 2: Identifying L51 Receiver Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL )

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" (see TERMINALS OF ECU ).

1. Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the integration control and panel assembly and the component shown by the sub-code.
   1. Check for an open or short in the AVC-LAN circuit between the integration control and panel assembly and the component shown by the sub-code.

      OK: There is no open or short circuit. 

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 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 INTEGRATION CONTROL AND PANEL ASSEMBLY  (See REMOVAL )

OK: END