LANE-KEEPING ASSIST SYSTEM, Diagnostic DTC:C1A70

DTC Code DTC Name
C1A70 Power Steering Control System

DESCRIPTION

When the lane keeping assist system operates, the driving support ECU sends a signal to the power steering ECU to operate the power steering motor.

DTC Code DTC Detection Condition Trouble Area
C1A70 When the vehicle speed is 50 km/h (31 mph) or more with the lane-keeping assist main switch on, a power steering system malfunction signal is received by the driving support ECU.

  • Power steering system

  • Driving support ECU

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC (POWER STEERING SYSTEM)


    1. Check for DTCs Click here.

      OK
      Power steering system DTCs are not output.

    NG

    GO TO POWER STEERING SYSTEM Click here

    OK

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

      Tech Tips

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


      1. Drive the vehicle at a 50 km/h (31 mph) or more, and operate lane-keeping assist system.

    2. Check for DTCs Click here.

      OK
      DTC C1A70 is not output.

      Note

      When replacing the driving support ECU, always replace it with a new one and be sure to perform initialization Click here. If an ECU which was installed to another vehicle is used, the information stored in the ECU will not match the information from the vehicle, and as a result, a DTC may be stored.


    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here