TOYOTA PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AEC

DESCRIPTION

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

WIRING DIAGRAM

PROCEDURE

1. INTELLIGENT CLEARANCE SONAR SYSTEM REGISTRATION

   
   

   1. Perform intelligent clearance sonar system registration.

      Click here

      Result
      Proceed to NEXT

   
   

   NEXT

2. CHECK DTC OUTPUT (C1AEC)

   
   

   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 C1AEC is output A No DTCs are output B

   
   

   B

   USE SIMULATION METHOD TO CHECK Click here

   A

3. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR LH)

   
   

   1. Disconnect the I28 clearance warning ECU assembly connector.

   2. Disconnect the B1 front corner ultrasonic sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I28-4 (BOF) - B1-4 (BI) Always Below 1 Ω I28-8 (SOF) - B1-5 (SI) Always Below 1 Ω I28-6 (E5) - B1-6 (EI) Always Below 1 Ω I28-4 (BOF) or B1-4 (BI) - Body ground Always 10 kΩ or higher I28-8 (SOF) or B1-5 (SI) - Body ground Always 10 kΩ or higher I28-6 (E5) or B1-6 (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 (FRONT CORNER ULTRASONIC SENSOR LH - FRONT CENTER ULTRASONIC SENSOR LH)

   
   

   1. Disconnect the B2 front center ultrasonic sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition B1-1 (BO) - B2-4 (BI) Always Below 1 Ω B1-2 (SO) - B2-5 (SI) Always Below 1 Ω B1-3 (EO) - B2-6 (EI) Always Below 1 Ω B1-1 (BO) or B2-4 (BI) - Body ground Always 10 kΩ or higher B1-2 (SO) or B2-5 (SI) - Body ground Always 10 kΩ or higher B1-3 (EO) or B2-6 (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 (FRONT CENTER ULTRASONIC SENSOR LH - FRONT CENTER ULTRASONIC SENSOR RH)

   
   

   1. Disconnect the B3 front center ultrasonic sensor RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition B2-1 (BO) - B3-4 (BI) Always Below 1 Ω B2-2 (SO) - B3-5 (SI) Always Below 1 Ω B2-3 (EO) - B3-6 (EI) Always Below 1 Ω B2-1 (BO) or B3-4 (BI) - Body ground Always 10 kΩ or higher B2-2 (SO) or B3-5 (SI) - Body ground Always 10 kΩ or higher B2-3 (EO) or B3-6 (EI) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HARNESS AND CONNECTOR (FRONT CENTER ULTRASONIC SENSOR RH - FRONT CORNER ULTRASONIC SENSOR RH)

   
   

   1. Disconnect the B4 front corner ultrasonic sensor RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition B3-1 (BO) - B4-4 (BI) Always Below 1 Ω B3-2 (SO) - B4-5 (SI) Always Below 1 Ω B3-3 (EO) - B4-6 (EI) Always Below 1 Ω B3-1 (BO) or B4-4 (BI) - Body ground Always 10 kΩ or higher B3-2 (SO) or B4-5 (SI) - Body ground Always 10 kΩ or higher B3-3 (EO) or B4-6 (EI) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. INSPECT FRONT CORNER ULTRASONIC SENSOR LH

   
   
   1. 

      *a	Component without harness connected (Front Corner Ultrasonic Sensor LH)

      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 FRONT CORNER ULTRASONIC SENSOR LH Click here

   OK

8. INSPECT FRONT CENTER ULTRASONIC SENSOR LH

   
   
   1. 

      *a	Component without harness connected (Front Center Ultrasonic Sensor LH)

      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 FRONT CENTER ULTRASONIC SENSOR LH Click here

   OK

9. INSPECT FRONT CENTER ULTRASONIC SENSOR RH

   
   
   1. 

      *a	Component without harness connected (Front Center Ultrasonic Sensor RH)

      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 FRONT CENTER ULTRASONIC SENSOR RH Click here

   OK

10. INSPECT FRONT CORNER ULTRASONIC SENSOR RH

    
    
    1. 

       *a	Component without harness connected (Front Corner Ultrasonic Sensor RH)

       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 FRONT CORNER ULTRASONIC SENSOR RH Click here

    OK

11. REPLACE FRONT CORNER ULTRASONIC SENSOR LH

    Result
    Proceed to NEXT

    
    

    1. Replace the front corner ultrasonic sensor LH with a new or 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 new or known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

12. CHECK DTC OUTPUT (C1AEC)

    
    

    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 C1AEC is output A No DTCs are output B

    
    

    B

    END (FRONT CORNER ULTRASONIC SENSOR LH WAS DEFECTIVE)

    A

13. REPLACE FRONT CENTER ULTRASONIC SENSOR LH

    Result
    Proceed to NEXT

    
    

    1. Replace the front center ultrasonic sensor LH with a new or 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 new or known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

14. CHECK DTC OUTPUT (C1AEC)

    
    

    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 C1AEC is output A No DTCs are output B

    
    

    B

    END (FRONT CENTER ULTRASONIC SENSOR LH WAS DEFECTIVE)

    A

15. REPLACE FRONT CENTER ULTRASONIC SENSOR RH

    Result
    Proceed to NEXT

    
    

    1. Replace the front center ultrasonic sensor RH with a new or 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 new or known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

16. CHECK DTC OUTPUT (C1AEC)

    
    

    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 C1AEC is output A No DTCs are output B

    
    

    B

    END (FRONT CENTER ULTRASONIC SENSOR RH WAS DEFECTIVE)

    A

17. REPLACE FRONT CORNER ULTRASONIC SENSOR RH

    Result
    Proceed to NEXT

    
    

    1. Replace the front corner ultrasonic sensor RH with a new or 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 new or known good sensor from the other end of the vehicle.

       Result
       Proceed to NEXT

    
    

    NEXT

18. CHECK DTC OUTPUT (C1AEC)

    
    

    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 C1AEC is output A No DTCs are output B

    
    

    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    B

    END (FRONT CORNER ULTRASONIC SENSOR RH WAS DEFECTIVE)