LANE DEPARTURE ALERT SYSTEM(w/o Dynamic Radar Cruise Control 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. DTC Detection Condition Trouble Area
C1AA3 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.

  • Electronically controlled brake system

  • Lane departure warning camera

WIRING DIAGRAM

A0007FPE40
*1 Skid Control ECU (Brake Booster with Master Cylinder Assembly
*2 Power Management Control ECU
*3 Lane Departure Warning Camera
*4 CAN Communication Line

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 Click here.

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Check if DTCs are output.

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

    5. Turn the power switch off.


    B

    GO TO DTC CHART (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Click here

    A

  2. CLEAR DTCs


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Clear DTCs.

    5. Turn the power switch off.


    NEXT

  3. CHECK FOR DTCs (LANE DEPARTURE ALERT)


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

      Tech Tips

      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 power switch on (IG).

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

    5. Check for DTCs.

      OK
      DTC C1AA3 is not output.

    6. Turn the power switch off.


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE LANE DEPARTURE WARNING CAMERA Click here