FORWARD RECOGNITION CAMERA SYSTEM, Diagnostic DTC:C1AA7

DTC Code DTC Name
C1AA7 Skid Control Buzzer Circuit

DESCRIPTION

The forward recognition camera operates the pre-collision warning by sending a buzzer request signal to the pre-collision city buzzer.

If the forward recognition camera detects a malfunction in the pre-collision city buzzer circuit, it will output DTC C1AA7.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AA7 Skid Control Buzzer Circuit

When the power switch is turned on (IG) and the pre-collision warning is operating, and one of the following conditions is met:


  • A buzzer request signal is sent to the pre-collision city buzzer but the buzzer does not sound for 1 second or more.

  • A buzzer request signal is not sent to the pre-collision city buzzer but the buzzer sounds for 1 second or more.

  • There is no buzzer sounding request and an open circuit is detected in the pre-collision city buzzer.

  • Pre-collision city buzzer

  • Forward recognition camera

  • Harness or connector

WIRING DIAGRAM

A005NSAE01
*a ECU-IG1 NO. 4
*b Pre-Collision City Buzzer
*c Forward Recognition Camera

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.

  • If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Axis Adjustment.

    Click here

PROCEDURE


  1. CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)


    1. Clear the DTCs.

      Click here


      Chassis > Front Recognition Camera > Clear DTCs

    2. Perform the Active Test according to the display on the GTS.

      Click here

      Note

      Perform the Active Test for 1 second or more.

      Tech Tips

      Performing the Active Test for 1 second or more causes DTC C1AA7 to be stored if the DTC detection conditions are met.


      Chassis > Front Recognition Camera > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      PCS Buzzer Pre-collision city buzzer ON / OFF Test possible with power switch on (IG), vehicle stopped

      Chassis > Front Recognition Camera > Active Test
      Tester Display
      PCS Buzzer

    3. Check for DTCs.

      Click here


      Chassis > Front Recognition Camera > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA7 is not output A
      DTC C1AA7 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. CHECK TERMINAL VOLTAGE


    1. A005MYIC09
      *a

      Front view of wire harness connector

      (to Pre-collision City Buzzer)

      Disconnect the pre-collision city buzzer connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F54-2 (IG1) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

    3. Connect the pre-collision city buzzer connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-COLLISION CITY BUZZER - AUXILIARY BATTERY)

    OK

  3. CHECK HARNESS AND CONNECTOR (PRE-COLLISION CITY BUZZER - FORWARD RECOGNITION CAMERA)


    1. Disconnect the F54 pre-collision city buzzer connector.

    2. Disconnect the R5 forward recognition camera connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F54-1 (BZ) - R5-8 (BZ) Always Below 1 Ω
      F54-1 (BZ) or R5-8 (BZ) - Body ground Always 10 kΩ or higher

    4. Connect the R5 forward recognition camera connector.

    5. Connect the F54 pre-collision city buzzer connector.

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

  4. REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-COLLISION CITY BUZZER - FORWARD RECOGNITION CAMERA)


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)


    1. Clear the DTCs.

      Click here


      Chassis > Front Recognition Camera > Clear DTCs

    2. Perform the Active Test according to the display on the GTS.

      Click here

      Note

      Perform the Active Test for 1 second or more.

      Tech Tips

      Performing the Active Test for 1 second or more causes DTC C1AA7 to be stored if the DTC detection conditions are met.


      Chassis > Front Recognition Camera > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      PCS Buzzer Pre-collision city buzzer ON / OFF Test possible with power switch on (IG), vehicle stopped

      Chassis > Front Recognition Camera > Active Test
      Tester Display
      PCS Buzzer

    3. Check for DTCs.

      Click here


      Chassis > Front Recognition Camera > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA7 is not output A
      DTC C1AA7 is output B

    A

    END

    B

  6. INSPECT PRE-COLLISION CITY BUZZER (CONFIRM BUZZER OPERATION)


    1. Turn the power switch on (IG).

    2. Check if the pre-collision city buzzer is sounding.

      Result
      Result Proceed to
      The pre-collision city buzzer does not sound when the power switch is turned on (IG) A
      The pre-collision city buzzer sounds continuously when the power switch is turned on (IG) B

    B

    GO TO STEP 8 Click here

    A

  7. INSPECT PRE-COLLISION CITY BUZZER (UNIT INSPECTION)


    1. Remove the pre-collision city buzzer.


    2. Inspect the pre-collision city buzzer.


      Result
      Result Proceed to
      pre-collision city buzzer is abnormal A
      Pre-collision city buzzer is normal B

    B

    GO TO STEP 9 Click here

    A

  8. REPLACE PRE-COLLISION CITY BUZZER


    1. Replace the pre-collision city buzzer.


      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)


    1. Clear the DTCs.

      Click here


      Chassis > Front Recognition Camera > Clear DTCs

    2. Perform the Active Test according to the display on the GTS.

      Click here

      Note

      Perform the Active Test for 1 second or more.

      Tech Tips

      Performing the Active Test for 1 second or more causes DTC C1AA7 to be stored if the DTC detection conditions are met.


      Chassis > Front Recognition Camera > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      PCS Buzzer Pre-collision city buzzer ON / OFF Test possible with power switch on (IG), vehicle stopped

      Chassis > Front Recognition Camera > Active Test
      Tester Display
      PCS Buzzer

    3. Check for DTCs.

      Click here


      Chassis > Front Recognition Camera > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA7 is not output A
      DTC C1AA7 is output B

    A

    END

    B

    REPLACE FORWARD RECOGNITION CAMERA Click here