DYNAMIC RADAR CRUISE CONTROL SYSTEM(for 6AR-FSE), Diagnostic DTC:P163181

DTC Code DTC Name
P163181 Communication Error from ECM to VSC Invalid Serial Data Received

DESCRIPTION

The ECM sends signals such as A/T information signals, dynamic radar cruise control operation signals and brake operation demand signals to the skid control ECU (brake actuator assembly) when the dynamic radar cruise control is operating. The ECM is the only component that has a function to store and output DTCs in the dynamic radar cruise control system. Therefore, if the skid control ECU (brake actuator assembly) detects a communication error from the ECM, it sends a malfunction signal back to the ECM.

DTC No. DTC Detection Condition Trouble Area
P163181 While the vehicle speed is 40 km/h (or 25 mph) or more and the dynamic radar cruise control system is operating (vehicle-to-vehicle distance control mode), if the ECM continuously receives a logical error signal from the skid control ECU (brake actuator assembly) for approximately 1 second or more.

  • Communication circuit

  • ECM

  • Skid control ECU (brake actuator assembly)

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Using the GTS, check that the CAN communication system is functioning normally.

      OK
      CAN communication system is functioning normally.

      Tech Tips

      Refer to CAN Bus Check for the CAN communication system Click here.


    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. REPLACE ECM

    Click here


    NEXT

  3. CHECK FOR DTCs (DTC P163181)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Make sure that the DTC detection conditions are met.

      Tech Tips

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

    4. Enter the following menus: Powertrain / Radar Cruise1 / Trouble Codes.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC P163181 is output B

    6. Turn the engine switch off.


    A

    END

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here