DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A41

DTC Code DTC Name
C1A41 Brake Request Value Mismatch between ENG / EHV and Driving Support ECU

DESCRIPTION

The skid control ECU assembly receives brake control request signals from the power management control ECU and driving support ECU assembly.

When the request signals received from the power management control ECU and driving support ECU assembly are not consistent, the skid control ECU assembly determines that a malfunction has occurred and sends a malfunction signal to the driving support ECU assembly.

DTC Code DTC Detection Condition Trouble Area
C1A41 While power switch is on (IG), brake request signal from power management control ECU and driving support ECU assembly is inconsistent for 3 second.

  • Electronically controlled brake system

  • Hybrid control system

  • Power management control ECU

  • Skid control ECU assembly

  • Driving support ECU assembly

CAUTION / NOTICE / HINT

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.

  • 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 with troubleshooting.


PROCEDURE


  1. CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Check for DTCs Click here.

      OK
      Electronically controlled brake system DTCs are not output.

    NG

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    OK

  2. CHECK FOR DTCs (HYBRID CONTROL SYSTEM)


    1. Check for DTCs.


      Result
      Result Proceed to
      Hybrid control system DTCs are not output A
      Hybrid control system DTCs are output (for 2AR-FSE) B
      Hybrid control system DTCs are output (for 2GR-FXE) C

    B

    GO TO HYBRID CONTROL SYSTEM Click here

    C

    GO TO HYBRID CONTROL SYSTEM Click here

    A

  3. REPLACE POWER MANAGEMENT CONTROL ECU


    1. Replace the power management control ECU with a new one 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.


      1. Turn the power switch on (IG).

      2. Wait for 3 seconds or more.

    3. Check for DTCs Click here.

      OK
      DTC C1A41 is not output.

    OK

    END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)

    NG

  5. REPLACE SKID CONTROL ECU ASSEMBLY


    1. Replace the skid control ECU assembly with a new one Click here.


    NEXT

  6. CHECK FOR DTC


    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.


      1. Turn the power switch on (IG).

      2. Wait for 3 seconds or more.

    3. Check for DTCs Click here.

      OK
      DTC C1A41 is not output.

    OK

    END (SKID CONTROL ECU ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here