DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A03, C1A06

DTC Code DTC Name
C1A03 Driving Support ECU Internal Logical Error
C1A06 Stop Light Switch Input Circuit

DESCRIPTION

This DTC indicates an internal abnormality of the driving support ECU assembly.

DTC No. DTC Detection Condition Trouble Area
C1A03 When the power switch is on (IG), the driving support ECU assembly detects an internal malfunction for 1 second or more. Driving support ECU assembly
C1A06 When the power switch is on (IG), the driving support ECU assembly detects an internal malfunction (stop light switch assembly input circuit malfunction) for 1 second or more. Driving support ECU assembly

INSPECTION PROCEDURE

Note

When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

PROCEDURE


  1. CHECK FOR DTCs (DTC C1A03 OR C1A06)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTCs Click here.

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

      Tech Tips

      If the detection conditions are not met, the malfunction cannot be detected.


      1. Drive the vehicle at a speed for which cruise control operation is possible.

      2. Turn the cruise control system on using the cruise control main switch (ON-OFF button).

      3. Push the cruise control main switch to -/SET to begin control of vehicle speed using the cruise control system.

    6. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

    7. Check for DTCs.

      Result
      Result Proceed to
      DTC C1A03 and C1A06 are not output A
      DTC C1A03 or C1A06 is output B

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here