VEHICLE PROXIMITY NOTIFICATION SYSTEM There is No Sound Made

DESCRIPTION

The vehicle approaching speaker controller receives stop light switch signals from the No. 2 integration relay, vehicle speed signals from the combination meter assembly, shift position P signals from the main body ECU (multiplex network body ECU) and engine operation signals from the engine oil pressure switch assembly in order to operate (sound) the vehicle approaching speaker assembly.

WIRING DIAGRAM

A000NTPE04

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses and relays for circuits related to this system before performing the following inspection procedure.

  • The vehicle proximity notification system troubleshooting procedures are based on the premise that the following systems are operating normally. Check these systems first before troubleshooting the vehicle proximity notification system.


    • Meter/gauge system

    • Lighting system

    • Audio system

    • Navigation system

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1350 is not output A
      DTC B1350 is output B
      GTS cannot communicate with the vehicle approaching warning system C

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART (B1350) Click here

    C

    GO TO OTHER PROBLEM (The diagnostic tool cannot communicate with the vehicle approaching warning system) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (PROXIMITY SOUND [VEHICLE STATIONARY])


    1. Using the GTS, perform the Active Test Click here.

      Vehicle Approaching Speaker Controller
      Tester Display Test Part Control Range Diagnostic Note
      Proximity Sound (Vehicle Stationary) Proximity sound (Vehicle stationary) ON / OFF Produces warning sound when vehicle is stopped
      OK
      The vehicle proximity notification system sounds or stops sounding according to the GTS display.

    NG

    CHECK VEHICLE APPROACHING SPEAKER CONTROLLER (OUTPUT WAVEFORM) Click here

    OK

  3. READ VALUE USING GTS (STOP LIGHT SW)


    1. Using the GTS, read the Data List Click here.

      Vehicle Approaching Speaker Controller
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light SW State of brake pedal / OFF or ON

      OFF: Brake pedal released

      ON: Brake pedal depressed

      		 -
      OK
      GTS display changes according to the state of the brake pedal.

    NG

    CHECK STOP LIGHT OPERATION Click here

    OK

  4. READ VALUE USING GTS (VEHICLE SPEED)


    1. Using the GTS, read the Data List Click here.

      Vehicle Approaching Speaker Controller
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Speed Vehicle speed / Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Almost same as actual vehicle speed -
      OK
      GTS display changes according to vehicle speed.

    NG

    CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - COMBINATION METER ASSEMBLY) Click here

    OK

  5. READ VALUE USING GTS (SHIFT POSITION)


    1. Using the GTS, read the Data List Click here.

      Vehicle Approaching Speaker Controller
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Shift Position Shift position P / Not Parking or Parking

      Not Parking: Shift lever not in P

      Parking: Shift lever in P

      		 -
      OK
      GTS display changes according to operation of the shift lever.

    NG

    CHECK VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    OK

  6. READ VALUE USING GTS (OIL PRESSURE SW)


    1. Using the GTS, read the Data List Click here.

      Vehicle Approaching Speaker Controller
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Oil Pressure SW Engine oil pressure switch / OFF or ON

      OFF: Engine operate

      ON: Engine not operate

      		 -
      OK
      GTS display changes according to engine operation.

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    CHECK ENGINE OIL PRESSURE SWITCH ASSEMBLY (OPSW SIGNAL) Click here

  7. CHECK VEHICLE APPROACHING SPEAKER CONTROLLER (OUTPUT WAVEFORM)


    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

    CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - VEHICLE APPROACHING SPEAKER ASSEMBLY) Click here

    OK

  8. 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

  9. CHECK HARNESS AND 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

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. CHECK STOP LIGHT OPERATION


    1. Confirm that the stop lights illuminate properly Click here.

      OK
      Stop lights illuminate properly.

    NG

    GO TO LIGHTING SYSTEM (EXT) Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - NO. 2 INTEGRATION RELAY)


    1. Disconnect the T55 vehicle approaching speaker controller connector.

    2. Disconnect the 1A No. 2 integration relay connector.

    3. Disconnect the U27 center stop light assembly connector.

    4. Disconnect the U45 rear combination light assembly LH connector.

    5. Disconnect the U43 rear combination light assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T55-2 (STP) - 1A-3 (STOP) Always Below 1 Ω
      T55-2 (STP) or 1A-3 (STOP) - Body ground Always 10 kΩ or higher

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - COMBINATION METER ASSEMBLY)


    1. Disconnect the T55 vehicle approaching speaker controller connector.

    2. Disconnect the N40 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T55-6 (SPD) - N40-19 (+S) Always Below 1 Ω
      T55-6 (SPD) or N40-19 (+S) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)


    1. With the connector of the combination meter assembly connected, check the waveform Click here.

      A000Q1HE02
      Text in Illustration
      *a

      Component with harness connected

      (Combination Meter Assembly)

      		 - -

    2. Using an oscilloscope, check the waveform.


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

        Item Condition
        Tester Connection N40-19 (+S) - Body ground
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Vehicle Condition Driving at approximately 20 km/h (12 mph)
        OK
        The waveform is displayed as shown in the illustration.

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    GO TO METER / GAUGE SYSTEM Click here

  14. CHECK VEHICLE APPROACHING SPEAKER CONTROLLER


    1. A000ONTE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Main Body ECU [Multiplex Network Body ECU])

      Disconnect the main body ECU (multiplex network body ECU) connector.

    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      N12-3 (SFTP) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU]) Click here

    OK

  15. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (SFTP SIGNAL)


    1. A000OKGE02
      Text in Illustration
      *a

      Component with harness connected

      (Main Body ECU [Multiplex Network Body ECU])

      With the connector of the main body ECU (multiplex network body ECU) connector Click here.

    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      N12-3 (SFTP) - Body ground Power switch on (IG), Shift lever in P Below 2.5 V
      Power switch on (IG), Shift lever not in P 8 V or higher

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  16. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the T55 vehicle approaching speaker controller connector.

    2. Disconnect the N12 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T55-11 (SFTP) - N12-3 (SFTP) Always Below 1 Ω
      T55-11 (SFTP) or N12-3 (SFTP) - Body ground Always 10 kΩ or higher

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  17. CHECK ENGINE OIL PRESSURE SWITCH ASSEMBLY (OPSW SIGNAL)


    1. A000N7IE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Vehicle Approaching Speaker Controller)

      Disconnect the vehicle approaching speaker controller connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      T55-12 (OPSW) - Switch body Idling* 8 V or higher
      Power switch on (IG) Below 2.0 V

      *: Enter vehicle preparation mode, and then perform the inspection Click here.


    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

  18. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - ENGINE OIL PRESSURE SWITCH ASSEMBLY)


    1. Disconnect the T55 vehicle approaching speaker controller connector.

    2. Disconnect the F38 engine oil pressure switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T55-12 (OPSW) - F38-1 Always Below 1 Ω
      T55-12 (OPSW) or F38-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE ENGINE OIL PRESSURE SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR