PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1AAA

DTC Code DTC Name
C1AAA FCM Destination Information Uninitialized

DESCRIPTION

When a new pre-crash safety city sensor is installed, it receives and stores vehicle destination information from the main body ECU (multiplex network body ECU). If the pre-crash safety city sensor cannot receive vehicle destination information from the main body ECU (multiplex network body ECU) and vehicle information is not stored, DTC C1AAA is output.

DTC Code DTC Detection Condition Trouble Area
C1AAA When the ignition switch is ON and the system is operating, vehicle information in the pre-crash safety city sensor is unconfirmed.

  • Main Body ECU (multiplex network body ECU)

  • Pre-crash safety city sensor

CAUTION / NOTICE / HINT

Note


  • When replacing the pre-crash safety city sensor, replace it with a new one. If an ECU which was installed to another vehicle is used, the information stored in the pre-crash safety city sensor will not match the information from the vehicle and, as a result, a DTC may be output.

  • If the pre-crash safety city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed to troubleshooting Click here.

  • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".


PROCEDURE


  1. CHECK FOR DTCs


    1. Clear the DTCs Click here.

    2. Turn the ignition switch to ON and wait for approximately 1 minute.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AAA is not output A
      DTC C1AAA is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Replace the main body ECU (multiplex network body ECU) with a new one.


    NEXT

  3. CHECK FOR DTCs


    1. Clear the DTCs Click here.

    2. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AAA is not output A
      DTC C1AAA is output B

    A

    END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

    B

    REPLACE PRE-CRASH SAFETY CITY SENSOR Click here