LEXUS PARKING ASSIST-SENSOR SYSTEM(w/ Intelligent Clearance Sonar 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

Click here

PROCEDURE

1. INITIALIZE NO. 1 ULTRASONIC SENSOR AND NO. 2 ULTRASONIC SENSOR

   
   

   1. Initialize the No. 1 ultrasonic sensor (front right center and front left center sensor) and No. 2 ultrasonic sensor (front left sensor and front right sensor).

      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 LEFT SENSOR)

   
   

   1. Disconnect the J38 clearance warning ECU assembly connector.

   2. Disconnect the B1 No. 2 ultrasonic sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition J38-4 (BOF) - B1-4 (BI) Always Below 1 Ω J38-8 (SOF) - B1-5 (SI) Always Below 1 Ω J38-6 (E5) - B1-6 (EI) Always Below 1 Ω J38-4 (BOF) or B1-4 (BI) - Body ground Always 10 kΩ or higher J38-8 (SOF) or B1-5 (SI) - Body ground Always 10 kΩ or higher J38-6 (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 LEFT SENSOR - FRONT LEFT CENTER SENSOR)

   
   

   1. Disconnect the B2*1 or B5*2 No. 1 ultrasonic sensor connector.

      
      

      • *1: for Sport Package

      • *2: except Sport Package

   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)*1 Always Below 1 Ω B1-2 (SO) - B2-5 (SI)*1 Always Below 1 Ω B1-3 (EO) - B2-6 (EI)*1 Always Below 1 Ω B1-1 (BO) - B5-4 (BI)*2 Always Below 1 Ω B1-2 (SO) - B5-5 (SI)*2 Always Below 1 Ω B1-3 (EO) - B5-6 (EI)*2 Always Below 1 Ω B1-1 (BO) or B2-4 (BI) - Body ground*1 Always 10 kΩ or higher B1-2 (SO) or B2-5 (SI) - Body ground*1 Always 10 kΩ or higher B1-3 (EO) or B2-6 (EI) - Body ground*1 Always 10 kΩ or higher B1-1 (BO) or B5-4 (BI) - Body ground*2 Always 10 kΩ or higher B1-2 (SO) or B5-5 (SI) - Body ground*2 Always 10 kΩ or higher B1-3 (EO) or B5-6 (EI) - Body ground*2 Always 10 kΩ or higher

      
      

      • *1: for Sport Package

      • *2: except Sport Package

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

   1. Disconnect the B3*1 or B6*2 No. 1 ultrasonic sensor connector.

      
      

      • *1: for Sport Package

      • *2: except Sport Package

   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)*1 Always Below 1 Ω B2-2 (SO) - B3-5 (SI)*1 Always Below 1 Ω B2-3 (EO) - B3-6 (EI)*1 Always Below 1 Ω B5-1 (BO) - B6-4 (BI)*2 Always Below 1 Ω B5-2 (SO) - B6-5 (SI)*2 Always Below 1 Ω B5-3 (EO) - B6-6 (EI)*2 Always Below 1 Ω B2-1 (BO) or B3-4 (BI) - Body ground*1 Always 10 kΩ or higher B2-2 (SO) or B3-5 (SI) - Body ground*1 Always 10 kΩ or higher B2-3 (EO) or B3-6 (EI) - Body ground*1 Always 10 kΩ or higher B5-1 (BO) or B6-4 (BI) - Body ground]*2 Always 10 kΩ or higher B5-2 (SO) or B6-5 (SI) - Body ground*2 Always 10 kΩ or higher B5-3 (EO) or B6-6 (EI) - Body ground*2 Always 10 kΩ or higher

      
      

      • *1: for Sport Package

      • *2: except Sport Package

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HARNESS AND CONNECTOR (FRONT RIGHT CENTER SENSOR - FRONT RIGHT SENSOR)

   
   

   1. Disconnect the B4 No. 2 ultrasonic sensor 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)*1 Always Below 1 Ω B3-2 (SO) - B4-5 (SI)*1 Always Below 1 Ω B3-3 (EO) - B4-6 (EI)*1 Always Below 1 Ω B6-1 (BO) - B4-4 (BI)*2 Always Below 1 Ω B6-2 (SO) - B4-5 (SI)*2 Always Below 1 Ω B6-3 (EO) - B4-6 (EI)*2 Always Below 1 Ω B3-1 (BO) or B4-4 (BI) - Body ground*1 Always 10 kΩ or higher B3-2 (SO) or B4-5 (SI) - Body ground*1 Always 10 kΩ or higher B3-3 (EO) or B4-6 (EI) - Body ground*1 Always 10 kΩ or higher B6-1 (BO) or B4-4 (BI) - Body ground*2 Always 10 kΩ or higher B6-2 (SO) or B4-5 (SI) - Body ground*2 Always 10 kΩ or higher B6-3 (EO) or B4-6 (EI) - Body ground*2 Always 10 kΩ or higher

      
      

      • *1: for Sport Package

      • *2: except Sport Package

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. INSPECT NO. 2 ULTRASONIC SENSOR (FRONT LEFT SENSOR)

   
   
   1. 

      *a	Component without harness connected (No. 2 Ultrasonic Sensor (Front 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. 2 ULTRASONIC SENSOR (FRONT LEFT SENSOR) Click here

   OK

8. INSPECT NO. 1 ULTRASONIC SENSOR (FRONT LEFT CENTER SENSOR)

   
   
   1. 

      *a	Component without harness connected (No. 1 Ultrasonic Sensor (Front 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. 1 ULTRASONIC SENSOR (FRONT LEFT CENTER SENSOR) Click here

   OK

9. INSPECT NO. 1 ULTRASONIC SENSOR (FRONT RIGHT CENTER SENSOR)

   
   
   1. 

      *a	Component without harness connected (No. 1 Ultrasonic Sensor (Front 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. 1 ULTRASONIC SENSOR (FRONT RIGHT CENTER SENSOR) Click here

   OK

10. INSPECT NO. 2 ULTRASONIC SENSOR (FRONT RIGHT SENSOR)

    
    
    1. 

       *a	Component without harness connected (No. 2 Ultrasonic Sensor (Front 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. 2 ULTRASONIC SENSOR (FRONT RIGHT SENSOR) Click here

    OK

11. REPLACE NO. 2 ULTRASONIC SENSOR (FRONT LEFT SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 2 ultrasonic sensor (front 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

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 LEFT SENSOR WAS DEFECTIVE)

    A

13. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT CENTER SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 1 ultrasonic sensor (front 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

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 LEFT CENTER SENSOR WAS DEFECTIVE)

    A

15. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT CENTER SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 1 ultrasonic sensor (front 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

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 RIGHT CENTER SENSOR WAS DEFECTIVE)

    A

17. REPLACE NO. 2 ULTRASONIC SENSOR (FRONT RIGHT SENSOR)

    Result
    Proceed to NEXT

    
    

    1. Replace the No. 2 ultrasonic sensor (front 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

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

    B

    END (FRONT RIGHT SENSOR WAS DEFECTIVE)