Bluetooth Handsfree Module Communication Error: Procedure

1. Enter the diagnostic mode.
   Fig 1: Identifying "Detailed Information Mode"

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

   HINT: 

   • "190 (radio receiver assembly)" is the component shown by the sub-code in the example shown in the illustration.
   • For details of the DTC display, refer to "DTC Check/Clear". Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Select the component shown by sub-code.

   HINT: 

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

   COMPONENT TABLE
   
   

   Component	Proceed to
   Except "Bluetooth" handsfree module	A
   "Bluetooth" handsfree module (19D)	B

B → See step   8 

A: Go to next step 

1. Inspect the power source circuit of the component shown by the sub-code.

   HINT: 

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

   COMPONENT TABLE
   
   

   Component	Proceed to
   Multi-media interface ECU (388)*3	Multi-media Interface ECU Power Source Circuit. Refer to Multi-media Interface ECU Power Source Circuit
   Stereo component amplifier assembly (440)*1	Stereo Component Amplifier Power Source Circuit. Refer to Stereo Component Amplifier Power Source Circuit
   Television display assembly (1B0)*2	Television display Power Source Circuit. Refer to Television Display Power Source Circuit
   Disc player assembly (1A0)*2	Disc Player Changer Power Source Circuit. Refer to Disc Player Changer Power Source Circuit

   • *1: w/ Stereo Component Amplifier Assembly
   • *2: w/ Rear Seat Entertainment System
   • *3: w/ USB Audio System

NEXT: Go to next step 

1. Disconnect the D133*1 and D60*2 radio receiver assembly connectors.
   Fig 2: Identifying D133 And D60 Radio Receiver Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • *1: w/ Stereo Component Amplifier Assembly
   • *2: w/ USB Audio System
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D133-5 (ATX+) - D133-15 (ATX-)*1	Always	60 to 80 Ω
   D60-9 (TXM+) - D60-10 (TXM-)*2	Always	60 to 80 Ω

   • *1: w/ Stereo Component Amplifier Assembly
   • *2: w/ USB Audio System
   TEXT IN ILLUSTRATION
   
   

   *A	w/ Stereo Component Amplifier Assembly
   *B	w/ USB Audio System
   *1	Component without harness connected (Radio Receiver Assembly)

NG → See step   9 

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". Refer to TERMINALS OF ECU .

1. Referring to the wiring diagram below, check the AVC-LAN circuit between the radio receiver assembly ("Bluetooth" handsfree module) and the component shown by the sub-code.
   1. Disconnect all connectors between the radio receiver assembly ("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 radio receiver assembly ("Bluetooth" handsfree module) and the component shown by the sub-code.

      OK

      There is no open or short circuit.

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

   Malfunction disappears.

NG → See step   7 

OK → END