PARKING SUPPORT ALERT SYSTEM No. 2 Clearance Warning Buzzer Circuit

DESCRIPTION

This circuit consists of the No. 2 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The ECU operates the buzzers using a sound pattern that changes depending on the distance to the obstacle.

PROCEDURE

1. Click here

   PERFORM ACTIVE TEST USING GTS

   
   

   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 / IPA/ICS/Clearance Sonar / Active Test.

   5. Check that the buzzer operates by performing the Active Test.

      
      
      1. Body Electrical > IPA/ICS/Clearance Sonar > Active Test

         Tester Display	Measurement Item	Control Range	Diagnostic Note
         Rear Buzzer	No. 2 clearance warning buzzer	Operate or Stop	Confirm that the vehicle is stopped and the power switch is on (IG)

      2. 
         
         10. 
             
      
      
      1. Body Electrical > IPA/ICS/Clearance Sonar > Active Test

         Tester Display
         Rear Buzzer

      2. 
         
         1. 
            
      3. 
         
         11. 
             

      OK
      The No. 2 clearance warning buzzer sounds.

      Result
      Proceed to OK NG

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 2 CLEARANCE WARNING BUZZER)

   
   

   1. Disconnect the L18 clearance warning ECU assembly connector.

   2. Disconnect the L21 No. 2 clearance warning buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition L18-15 (BBZ) - L21-1 (Z+) Always Below 1 Ω L18-16 (ER) - L21-2 (Z-) Always Below 1 Ω L18-15 (BBZ) or L21-1 (Z+) - Body ground Always 10 kΩ or higher L18-16 (ER) or L21-2 (Z-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

3. Click here

   REPLACE NO. 2 CLEARANCE WARNING BUZZER

   
   

   1. Replace the No. 2 clearance warning buzzer with a new or known good one.

      Click here

      Result
      Proceed to NEXT

   
   
   • NEXTClick here
4. Click here

   PERFORM ACTIVE TEST USING GTS

   
   

   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 / IPA/ICS/Clearance Sonar / Active Test.

   5. Check that the buzzer operates by performing the Active Test.

      
      
      1. Body Electrical > IPA/ICS/Clearance Sonar > Active Test

         Tester Display	Measurement Item	Control Range	Diagnostic Note
         Rear Buzzer	No. 2 clearance warning buzzer	Operate or Stop	Confirm that the vehicle is stopped and the power switch is on (IG)

      2. 
         
         10. 
             
      
      
      1. Body Electrical > IPA/ICS/Clearance Sonar > Active Test

         Tester Display
         Buzzer

      2. 
         
         1. 
            
      3. 
         
         11. 
             

      OK
      The No. 2 clearance warning buzzer sounds.

      Result
      Proceed to OK NG

   
   
   • OK

     END (NO. 2 CLEARANCE WARNING BUZZER WAS DEFECTIVE)

   • NG

     REPLACE CLEARANCE WARNING ECU ASSEMBLYClick here