LANE DEPARTURE ALERT SYSTEM, Diagnostic DTC:C1AA3

DTC Code DTC Name
C1AA3 Vehicle Speed Sensor Circuit

DESCRIPTION

The lane departure warning camera receives vehicle speed signals from the skid control ECU via CAN communication to control the lane departure alert system. When the lane departure warning camera receives information that there is a malfunction in the vehicle speed sensor, DTC C1AA3 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AA3

Vehicle Speed Sensor Circuit

While driving with the lane departure alert system activated and the lane departure alert main switch on, a signal indicating a malfunction in the vehicle speed sensor is received from the skid control ECU for 5 seconds or more.

  • Vehicle stability control system

  • Lane departure warning camera

CAUTION / NOTICE / HINT

Note:

  • When the lane departure warning camera is replaced with a new one, adjustment of the lane departure warning camera beam axis must be performed.

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  • The lane departure alert system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the lane departure alert system after confirming that the communication systems are functioning properly.

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PROCEDURE

  1. CHECK FOR DTC (ABS/VSC/TRC)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

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

    4. Check for DTCs.

      Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Proceed to

    Vehicle stability control system DTCs are not output

    Vehicle stability control system DTCs are output
    Vehicle stability control system DTCs are output

    GO TO VEHICLE STABILITY CONTROL SYSTEM

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    Vehicle stability control system DTCs are not output

  2. CLEAR DTC

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes / Clear DTCs.

    4. Clear the DTCs.

      Chassis > Lane Departure Alert > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  3. CHECK FOR DTC

    1. Perform the following to make sure the DTC detection conditions are met.

      Tip:

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

      1. Drive the vehicle at a speed between 50 km/h (32 mph) and 220 km/h (138 mph) and operate the lane departure alert system.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes.

    5. Check for DTCs.

      Chassis > Lane Departure Alert > Trouble Codes

    Result

    Proceed to

    No DTCs are output

    DTC C1AA3 is output
    No DTCs are output

    USE SIMULATION METHOD TO CHECK

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    DTC C1AA3 is output

    REPLACE LANE DEPARTURE WARNING CAMERA

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