PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A48

DTC Code DTC Name
C1A48 G Sensor

DESCRIPTION

The pre-crash safety city sensor receives G sensor signals from the airbag ECU assembly (yaw rate sensor) and outputs this DTC when a G sensor malfunction is received.

DTC Code DTC Detection Condition Trouble Area
C1A48 Once 3 seconds or more elapse after the ignition switch is turned to ON, the pre-crash safety city sensor continuously receives a G sensor malfunction from the airbag ECU assembly (yaw rate sensor) for 5 seconds or more while the IG voltage is 10 V or more.

  • Electronically controlled brake system

  • Airbag ECU assembly (yaw rate sensor)

  • 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 (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Trouble Codes.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      Electronically controlled brake system DTCs are not output A
      Electronically controlled brake system DTCs are output B

    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    A

  2. 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 C1A48 is not output A
      DTC C1A48 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. REPLACE PRE-COLLISION CITY SENSOR


    1. Replace the pre-crash safety city sensor Click here.


    NEXT

  4. 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 C1A48 is not output A
      DTC C1A48 is output B

    A

    END (PRE-CRASH SAFETY CITY SENSOR WAS DEFECTIVE)

    B

    REPLACE AIRBAG ECU ASSEMBLY (YAW RATE SENSOR) Click here