LEXUS PARKING ASSIST-SENSOR SYSTEM(w/o Intelligent Clearance Sonar System), Diagnostic DTC:C1AED

DESCRIPTION

This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor.

WIRING DIAGRAM

Click here

PROCEDURE

1. CHECK DTC OUTPUT (C1AED)

   
   

   1. Check for DTCs.

      Click here

      
      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

   2. Clear the DTCs.

      Click here

      
      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

   3. Recheck for DTCs.

      Click here

      
      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

      Result
      Result Proceed to DTC C1AED is output A No DTCs are output B

   
   

   B

   USE SIMULATION METHOD TO CHECK Click here

   A

2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - REAR RIGHT SENSOR)

   
   

   1. Disconnect the J38 clearance warning ECU assembly connector.

   2. Disconnect the Y1 No. 3 ultrasonic sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition J38-22 (BOR) - Y1-4 (BI) Always Below 1 Ω J38-24 (SOR) - Y1-5 (SI) Always Below 1 Ω J38-23 (E1) - Y1-6 (EI) Always Below 1 Ω J38-22 (BOR) or Y1-4 (BI) - Body ground Always 10 kΩ or higher J38-24 (SOR) or Y1-5 (SI) - Body ground Always 10 kΩ or higher J38-23 (E1) or Y1-6 (EI) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (REAR RIGHT SENSOR - REAR RIGHT CENTER SENSOR)

   
   

   1. Disconnect the Y2 No. 4 ultrasonic sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Y1-1 (BO) - Y2-4 (BI) Always Below 1 Ω Y1-2 (SO) - Y2-5 (SI) Always Below 1 Ω Y1-3 (EO) - Y2-6 (EI) Always Below 1 Ω Y1-1 (BO) or Y2-4 (BI) - Body ground Always 10 kΩ or higher Y1-2 (SO) or Y2-5 (SI) - Body ground Always 10 kΩ or higher Y1-3 (EO) or Y2-6 (EI) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (REAR RIGHT CENTER SENSOR - REAR LEFT CENTER SENSOR)

   
   

   1. Disconnect the Y3 No. 4 ultrasonic sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Y2-1 (BO) - Y3-4 (BI) Always Below 1 Ω Y2-2 (SO) - Y3-5 (SI) Always Below 1 Ω Y2-3 (EO) - Y3-6 (EI) Always Below 1 Ω Y2-1 (BO) or Y3-4 (BI) - Body ground Always 10 kΩ or higher Y2-2 (SO) or Y3-5 (SI) - Body ground Always 10 kΩ or higher Y2-3 (EO) or Y3-6 (EI) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK HARNESS AND CONNECTOR (REAR LEFT CENTER SENSOR - REAR LEFT SENSOR)

   
   

   1. Disconnect the Y4 No. 5 ultrasonic sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Y3-1 (BO) - Y4-4 (BI) Always Below 1 Ω Y3-2 (SO) - Y4-5 (SI) Always Below 1 Ω Y3-3 (EO) - Y4-6 (EI) Always Below 1 Ω Y3-1 (BO) or Y4-4 (BI) - Body ground Always 10 kΩ or higher Y3-2 (SO) or Y4-5 (SI) - Body ground Always 10 kΩ or higher Y3-3 (EO) or Y4-6 (EI) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. INSPECT NO. 3 ULTRASONIC SENSOR (REAR RIGHT SENSOR)

   
   
   1. 

      *a	Component without harness connected (No. 1 Ultrasonic Sensor (Rear Right Sensor))

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

      Standard Resistance
      Tester Connection Condition Specified Condition 4 (BI) - 6 (EI) Always 10 kΩ or higher 4 (BI) - 1 (BO) Always Below 1 Ω 5 (SI) - 2 (SO) Always Below 30 Ω 6 (EI) - 3 (EO) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE NO. 3 ULTRASONIC SENSOR (REAR RIGHT SENSOR) Click here

   OK

7. INSPECT NO. 4 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR)

   
   
   1. 

      *a	Component without harness connected (No. 2 Ultrasonic Sensor (Rear Right Center Sensor))

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

      Standard Resistance
      Tester Connection Condition Specified Condition 4 (BI) - 6 (EI) Always 10 kΩ or higher 4 (BI) - 1 (BO) Always Below 1 Ω 5 (SI) - 2 (SO) Always Below 30 Ω 6 (EI) - 3 (EO) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE NO. 4 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) Click here

   OK

8. INSPECT NO. 4 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR)

   
   
   1. 

      *a	Component without harness connected (No. 1 Ultrasonic Sensor (Rear Left Center Sensor))

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

      Standard Resistance
      Tester Connection Condition Specified Condition 4 (BI) - 6 (EI) Always 10 kΩ or higher 4 (BI) - 1 (BO) Always Below 1 Ω 5 (SI) - 2 (SO) Always Below 30 Ω 6 (EI) - 3 (EO) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE NO. 4 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) Click here

   OK

9. INSPECT NO. 3 ULTRASONIC SENSOR (REAR LEFT SENSOR)

   
   
   1. 

      *a	Component without harness connected (No. 1 Ultrasonic Sensor (Rear Left Sensor))

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

      Standard Resistance
      Tester Connection Condition Specified Condition 4 (BI) - 6 (EI) Always 10 kΩ or higher 4 (BI) - 1 (BO) Always Below 1 Ω 5 (SI) - 2 (SO) Always Below 30 Ω 6 (EI) - 3 (EO) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE NO. 3 ULTRASONIC SENSOR (REAR LEFT SENSOR) Click here

   OK

10. REPLACE NO. 3 ULTRASONIC SENSOR (REAR RIGHT SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 3 ultrasonic sensor (rear right sensor) with a known good one.

       Click here

       Tech Tips

       All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

11. CHECK DTC OUTPUT (C1AED)

    
    

    1. Clear the DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    2. Check for DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

       Result
       Result Proceed to DTC C1AED is output A No DTCs are output B

    
    

    B

    END (REAR RIGHT SENSOR WAS DEFECTIVE)

    A

12. REPLACE NO. 4 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 4 ultrasonic sensor (rear right center sensor) with a known good one.

       Click here

       Tech Tips

       All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

13. CHECK DTC OUTPUT (C1AED)

    
    

    1. Clear the DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    2. Check for DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

       Result
       Result Proceed to DTC C1AED is output A No DTCs are output B

    
    

    B

    END (REAR RIGHT CENTER SENSOR WAS DEFECTIVE)

    A

14. REPLACE NO. 4 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 4 ultrasonic sensor (rear left center sensor) with a known good one.

       Click here

       Tech Tips

       All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

15. CHECK DTC OUTPUT (C1AED)

    
    

    1. Clear the DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    2. Check for DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

       Result
       Result Proceed to DTC C1AED is output A No DTCs are output B

    
    

    B

    END (REAR LEFT CENTER SENSOR WAS DEFECTIVE)

    A

16. REPLACE NO. 3 ULTRASONIC SENSOR (REAR LEFT SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 3 ultrasonic sensor (rear left sensor) with a known good one.

       Click here

       Tech Tips

       All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

17. CHECK DTC OUTPUT (C1AED)

    
    

    1. Clear the DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    2. Check for DTCs.

       Click here

       
       Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

       Result
       Result Proceed to DTC C1AED is output A No DTCs are output B

    
    

    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY for LHD: Click here REPLACE CLEARANCE WARNING ECU ASSEMBLY for RHD: Click here

    B

    END (REAR LEFT SENSOR WAS DEFECTIVE)