Inspection Procedure

1. Enter the diagnostic mode.
   Fig 1: Diagnostic Mode Screen - Service Check Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "3" to change to "Detailed Information Mode".
3. Identify the component shown by the sub-code.

   HINT:

   • "P190" set by the radio receiver shown in the preceding illustration as an example.
   • For details of the DTC display, refer to "DTC CHECK/CLEAR " .

1. Select the component shown by sub-code.

   HINT:

   The "Bluetooth" handsfree module is built into the radio receiver. If there is a problem between the "Bluetooth" handsfree module and radio receiver, replace the radio receiver.

   Component Table: 

   COMPONENT REFERENCE
   
   

   Component	Proceed to
   Radio Receiver (190)	A
   Except Radio Receiver	B

A: REPLACE RADIO RECEIVER 

B: Go to Next Step 

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: 

   COMPONENT REFERENCE
   
   

   Component	Proceed to
   Television display assembly (1 B0)	Television display assembly power source circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT  )
   Stereo component amplifier (440)	Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT  )

1. Disconnect the radio receiver connector.
Fig 2: Identifying Radio Receiver Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   ATX+ (R7-5) - ATX- (R7-15)((1))	Always	60 to 80 Ω
   TXM+ (R8-9) - TXM- (R8-10)	Always	60 to 80 Ω
   (1) 10 Speaker System

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 "TERMINALS OF ECU " .

1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the "Bluetooth" handsfree module and the component shown by the sub-code.
   1. Disconnect all connectors between the "Bluetooth" handsfree module and the component shown by the sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the "Bluetooth" handsfree module 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 RADIO RECEIVER (BUILT-IN "BLUETOOTH" HANDSFREE MODULE) 

OK: END