Inspection Procedure

1. Enter the diagnostic mode.
   Fig 1: Service Check Mode Description Chart (Detailed Information Mode)

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

   HINT:

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

1. Select the component which has stored this 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 TABLE
   
   

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

B : REPLACE RADIO RECEIVER 

A: 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 TABLE
   
   

   Component	Proceed to
   Gateway ECU (1C6)	Gateway ECU power source circuit (See GATEWAY ECU POWER SOURCE CIRCUIT  )
   Radio receiver (190)	Radio receiver power source circuit (See RADIO RECEIVER 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 connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   TX+ (E15-9) - TX- (E15-10)	Always	60 to 80 Ω
   ATX+ (E12-5) - ATX- (E12-15) (*1)	Always	60 to 80 Ω
   HINT: *1: for 12 Speaker System

NG: REPLACE RADIO RECEIVER 

Fig 2: Identifying Radio Receiver Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 " .

1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display (accessory meter) and the component shown by the sub-code.
   1. Disconnect all connectors between the multi-display (accessory meter) and the component shown by the sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the multi-display (accessory meter) 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 MULTI-DISPLAY (ACCESSORY METER) 

OK : END