TOYOTA PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AEE

DTC Code DTC Name
C1AEE IPA Sensor Communication Circuit

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AEE IPA Sensor Communication Circuit An open or short circuit in the communication line between the front side sensors and ECU or a malfunction in a front side sensor during initialization mode after the power switch is turned on (IG).

  • Front side ultrasonic sensor circuit

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

B004QG7E59
*a Front Side Ultrasonic Sensor RH
*b Front Side Ultrasonic Sensor LH
*c Clearance Warning ECU Assembly

PROCEDURE


  1. INTELLIGENT CLEARANCE SONAR SYSTEM REGISTRATION


    1. Perform intelligent clearance sonar system registration.

      Tech Tips

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK DTC


    1. Using the GTS, check for DTCs according to the prompts on the screen.


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

  3. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC OUTPUT (C1AEE)


    1. Recheck for DTCs and check if the same DTC is output again.


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      C1AEE is output A
      C1AEE is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

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


    1. Disconnect the F26 clearance warning ECU assembly connector.

    2. Disconnect the B5 front side ultrasonic sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F26-2 (CSB1) - B5-4 (BI) Always Below 1 Ω
      F26-7 (LIN1) - B5-5 (SI) Always Below 1 Ω
      F26-5 (CSG1) - B5-6 (EI) Always Below 1 Ω
      F26-2 (CSB1) or B5-4 (BI) - Body ground Always 10 kΩ or higher
      F26-7 (LIN1) or B5-5 (SI) - Body ground Always 10 kΩ or higher
      F26-5 (CSG1) or B5-6 (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 SIDE ULTRASONIC SENSOR LH - FRONT SIDE ULTRASONIC SENSOR RH)


    1. Disconnect the B6 front side ultrasonic sensor RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B5-1 (BO) - B6-4 (BI) Always Below 1 Ω
      B5-2 (SO) - B6-5 (SI) Always Below 1 Ω
      B5-3 (EO) - B6-6 (EI) Always Below 1 Ω
      B5-1 (BO) or B6-4 (BI) - Body ground Always 10 kΩ or higher
      B5-2 (SO) or B6-5 (SI) - Body ground Always 10 kΩ or higher
      B5-3 (EO) or B6-6 (EI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT FRONT SIDE ULTRASONIC SENSOR LH


    1. B004PXTC37
      *a

      Component without harness connected

      (Front Side Ultrasonic Sensor LH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B5-4 (BI) - B5-6 (EI) Always 10 kΩ or higher
      B5-4 (BI) - B5-1 (BO) Always Below 1 Ω
      B5-5 (SI) - B5-2 (SO) Always Below 30 Ω
      B5-6 (EI) - B5-3 (EO) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SIDE ULTRASONIC SENSOR LH Click here

    OK

  8. INSPECT FRONT SIDE ULTRASONIC SENSOR RH


    1. B004PXTC35
      *a

      Component without harness connected

      (Front Side Ultrasonic Sensor RH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B6-4(BI) - B6-6(EI) Always 10 kΩ or higher
      B6-4(BI) - B6 -1(BO) Always Below 1 Ω
      B6-5(SI) - B6 -2(SO) Always Below 30 Ω
      B6-6(EI) - B6 -3(EO) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SIDE ULTRASONIC SENSOR RH Click here

    OK

  9. REPLACE FRONT SIDE ULTRASONIC SENSOR LH

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  10. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  11. CHECK DTC OUTPUT (C1AEE)


    1. Recheck for DTCs and check if the same DTC is output again.


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      C1AEE is output A
      C1AEE is not output B

    B

    END (FRONT SIDE ULTRASONIC SENSOR LH WAS DEFECTIVE)

    A

  12. REPLACE FRONT SIDE ULTRASONIC SENSOR RH

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  13. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  14. CHECK DTC OUTPUT (C1AEE)


    1. Recheck for DTCs and check if the same DTC is output again.


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      C1AEE is output A
      C1AEE is not output B

    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    B

    END (FRONT SIDE ULTRASONIC SENSOR RH WAS DEFECTIVE)