VEHICLE PROXIMITY NOTIFICATION SYSTEM, Diagnostic DTC:B1350

DTC Code DTC Name
B1350 Speaker Circuit

DESCRIPTION

The vehicle approaching speaker assembly circuit consists of the vehicle approaching speaker controller and vehicle approaching speaker assembly.

DTC B1350 is stored when a malfunction is detected in the vehicle approaching speaker assembly circuit.

DTC Code DTC Detection Condition Trouble Area
B1350

Either condition is met:


  • output voltage is being monitored by the ECU, with the power switch on (IG), battery voltage 10 V or more, and a warning sound being produced, a speaker circuit short condition continues for 1 second or more.

  • When the sound output voltage is being monitored by the ECU, with the power switch on (IG) and a warning sound not being produced, a speaker circuit open condition continues for 5 seconds or more.

  • Vehicle approaching speaker controller

  • Vehicle approaching speaker assembly

  • Harness or connector

WIRING DIAGRAM

A000SOWE25
*a SP+
*b SP-
*c Vehicle Approaching Speaker Assembly
*d Vehicle Approaching Speaker Controller

PROCEDURE


  1. CHECK HARNESS OR CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - VEHICLE APPROACHING SPEAKER ASSEMBLY)


    1. Disconnect the T55 vehicle approaching speaker controller connector.

    2. Disconnect the A80 vehicle approaching speaker assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      T55-3 (SP+) - A80-1 Always Below 1 Ω
      T55-8 (SP-) - A80-2 Always Below 1 Ω
      T55-3 (SP+) or A80-1 - Body ground Always 10 kΩ or higher
      T55-8 (SP-) or A80-2 - Body ground Always 10 kΩ or higher
      T55-3 (SP+) - T55-8 (SP-) Always 10 kΩ or higher
      A80-1 - A80-2 Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK VEHICLE APPROACHING SPEAKER ASSEMBLY


    1. Disconnect the vehicle approaching speaker assembly connector.

      A000N84E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Vehicle Approaching Speaker Assembly)

      		 - -

    2. Turn the power switch on (IG).

    3. Using the GTS, perform the Active Test "Proximity Sound (Vehicle Stationary)" Click here.

      Tech Tips

      DTCs may be output when connectors are disconnected during inspection. Therefore, make sure to clear the DTCs using the GTS once the inspection has been completed.

    4. Using an oscilloscope, check the waveform.


      1. Check the signal waveform according to the condition(s) in the table below.

        Item Condition
        Tester Connection A80-1 - A80-2
        Tool Setting 1 V/DIV., 200 ms./DIV.
        Vehicle Condition Speaker operating
      OK
      The waveform is displayed as shown in the illustration.

    NG

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    OK

  3. INSPECT VEHICLE APPROACHING SPEAKER ASSEMBLY

    Note


    • Make sure that there is no looseness, rattling, or other problem with the vehicle approaching speaker assembly installation.

    • Make sure that there is no foreign matter inside the vehicle approaching speaker assembly.


    1. Remove the vehicle approaching speaker assembly Click here.

    2. Inspect the vehicle approaching speaker assembly Click here.


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE VEHICLE APPROACHING SPEAKER ASSEMBLY Click here