VEHICLE PROXIMITY NOTIFICATION SYSTEM There is No Sound Made

DESCRIPTION

The vehicle approaching speaker controller receives stop light switch signals from the semiconductor pwr integration ECU, vehicle speed signals from the combination meter assembly and permission signals from the hybrid vehicle control ECU assembly, and produces the warning sound from the vehicle approaching speaker assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK DTC OUTPUT

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Trouble Codes.

      
      Body Electrical > Vehicle Proximity Notification System > Trouble Codes

   5. Check for DTCs.

      Result
      Result Proceed to DTC B1350 is not output A DTC B1350 is output B Communication with the GTS is not possible C

   
   

   B

   GO TO DTC CHART B1350 Click here

   C

   GO TO OTHER DIAGNOSIS PROCEDURE (Communication between Vehicle Proximity Notification System and Diagnostic Tool is not Possible) Click here

   A

2. PERFORM ACTIVE TEST USING GTS (Proximity Sound (Vehicle Stationary))

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > Vehicle Proximity Notification System > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Proximity Sound (Vehicle Stationary)	Proximity sound (Vehicle stationary)	OFF or ON	Produces warning sound when vehicle is stopped

      
      Body Electrical > Vehicle Proximity Notification System > Active Test

      Tester Display
      Proximity Sound (Vehicle Stationary)

      Result
      Result Proceed to The warning sound is produced A The warning sound is not produced B

   
   

   B

   INSPECT VEHICLE APPROACHING SPEAKER ASSEMBLY Click here

   A

3. READ VALUE USING GTS (Stop Light SW)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Data List.

   5. Read the Data List according to the display on the GTS.

      
      Body Electrical > Vehicle Proximity Notification System > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Stop Light SW	Stop light switch	OFF or ON	OFF: Brake pedal released ON: Brake pedal depressed	-

      
      Body Electrical > Vehicle Proximity Notification System > Data List

      Tester Display
      Stop Light SW

      Result
      Result Proceed to The GTS display changes according to brake pedal operation A The GTS display does not change according to brake pedal operation B

   
   

   B

   CHECK STOP LIGHT OPERATION Click here

   A

4. READ VALUE USING GTS (Vehicle Speed)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Data List.

   5. Read the Data List according to the display on the GTS.

      
      Body Electrical > Vehicle Proximity Notification System > Data List

      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 the same as actual vehicle speed	-

      
      Body Electrical > Vehicle Proximity Notification System > Data List

      Tester Display
      Vehicle Speed

      Result
      Result Proceed to The GTS display changes according to the vehicle speed A The GTS display does not change according to the vehicle speed B

   
   

   B

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

   A

5. READ VALUE USING GTS (Permission Signal)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Data List.

   5. Read the Data List according to the display on the GTS.

      
      Body Electrical > Vehicle Proximity Notification System > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Permission Signal	Vehicle proximity notification system permission signal	OFF or ON	OFF: Vehicle proximity notification system operation prohibited (engine is operating or shift lever is in P) ON: Vehicle proximity notification system operation permitted (engine is stopped and shift lever is not in P)	-

      
      Body Electrical > Vehicle Proximity Notification System > Data List

      Tester Display
      Permission Signal

      Result
      Result Proceed to The GTS display changes according to the engine status or the shift lever position A The GTS display does not change according to the engine status or the shift lever position B

   
   

   A

   REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

   B

6. CHECK VEHICLE APPROACHING SPEAKER CONTROLLER (PERMISSION SIGNAL)

   

   *a	Component with harness connected (Vehicle Approaching Speaker Controller)

   
   

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

      Standard Voltage
      Tester Connection Condition Specified Condition K145-11 (KOK) - Body ground Power switch on (READY), shift lever in P Below 2.3 V Power switch on (READY), engine stopped and shift lever not in P 8 V or higher

      Result
      Result OK NG

   
   

   OK

   REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

   NG

7. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - HYBRID VEHICLE CONTROL ECU ASSEMBLY)

   
   

   1. Disconnect the K145 vehicle approaching speaker controller connector.

   2. Disconnect the K141 hybrid vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition K145-11 (KOK) - K141-7 (KOK) Always Below 1 Ω K145-11 (KOK) or K141-7 (KOK) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER

   
   

   1. Replace the vehicle approaching speaker controller with a new or known good one.

      Click here

      OK
      The operation of the vehicle proximity notification system returns to normal.

      Result
      Proceed to OK NG

   
   

   OK

   END (VEHICLE APPROACHING SPEAKER CONTROLLER WAS DEFECTIVE)

   NG

   REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

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

   
   

   1. Disconnect the K3 combination meter assembly connector.

   2. Disconnect the K145 vehicle approaching speaker controller connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition K3-19 (+S) - K145-6 (SPD) Always Below 1 Ω K3-19 (+S) or K145-6 (SPD) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

10. CHECK COMBINATION METER ASSEMBLY

    

    *a	Component with harness connected (Combination Meter Assembly)

    
    

    1. Connect the K3 combination meter assembly connector.

    2. Connect the K145 vehicle approaching speaker controller connector.

    3. Check the input waveform.

       
       

       1. Remove the combination meter assembly with the connector(s) still connected.

       2. Connect an oscilloscope to terminal K3-19 (+S) and body ground.

       3. Turn the power switch on (IG).

       4. Turn a wheel slowly.

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

          Item	Condition
          Tool setting	5 V/DIV., 20 ms./DIV.
          condition	Power switch on (IG), wheel being rotated

          OK
          The waveform is similar to that shown in the illustration.

          Tech Tips

          When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    GO TO METER / GAUGE SYSTEM Click here

11. CHECK STOP LIGHT OPERATION

    
    

    1. Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released.

       OK
       Condition Illumination Condition Brake pedal depressed On Brake pedal released Off

       Result
       Result OK NG

    
    

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

12. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - SEMICONDUCTOR PWR INTEGRATION ECU)

    
    

    1. Disconnect the K145 vehicle approaching speaker controller connector.

    2. Disconnect the 1F semiconductor pwr integration ECU connector.

    3. Disconnect the Q43 rear combination light assembly LH connector.

    4. Disconnect the Q5 rear combination light assembly RH connector.

    5. Disconnect the Q8 center stop light assembly connector.

    6. Disconnect the A24 skid control ECU assembly connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition K145-2 (STP) - 1F-9 (OUT) Always Below 1 Ω K145-2 (STP) or 1F-9 (OUT) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

13. INSPECT VEHICLE APPROACHING SPEAKER ASSEMBLY

    
    

    1. Remove the vehicle approaching speaker assembly.

       Click here

    2. Inspect the vehicle approaching speaker assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE VEHICLE APPROACHING SPEAKER ASSEMBLY Click here

    OK

14. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER ASSEMBLY - VEHICLE APPROACHING SPEAKER CONTROLLER)

    
    

    1. Disconnect the K145 vehicle approaching speaker controller connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition B10-1 (+) - K145-3 (SP+) Always Below 1 Ω B10-2 (-) - K145-8 (SP-) Always Below 1 Ω B10-1 (+) or K145-3 (SP+) - Body ground Always 10 kΩ or higher B10-2 (-) or K145-8 (SP-) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR