DYNAMIC RADAR CRUISE CONTROL SYSTEM, 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, brake operation demand signals, and buzzer operation demand signals to the skid control ECU (brake actuator assembly) when the dynamic radar cruise control is operating. Therefore, if the skid control ECU (brake actuator assembly) detects a communication error with the ECM, it sends a malfunction signal back to the ECM.

DTC No. Detection Item DTC Detection Condition Trouble Area
P163181 Communication Error from ECM to VSC Invalid Serial Data Received

    w/o Full-speed range following function:

  • While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, the ECM continuously receives a logical error signal from the skid control ECU (brake actuator assembly) for approximately 1 second or more.


    w/ Full-speed range following function:

  • While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, the ECM continuously receives a logical error signal from the skid control ECU (brake actuator assembly) for approximately 1 second or more.

  • CAN communication circuit

  • ECM

  • Skid control ECU (brake actuator assembly)

CAUTION / NOTICE / HINT

Note


  • Before replacing the ECM, refer to Service Bulletin.

  • 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.

    Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


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

      Click here

      Result
      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK FOR DTCs (RADAR CRUISE 1)


    1. Clear the DTCs.

      Click here


      Powertrain > Cruise Control > Clear DTCs

    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.

    3. Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      Result
      Result Proceed to
      DTC P163181 is not output A
      DTC P163181 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTCs (RADAR CRUISE 1)


    1. Clear the DTCs.

      Click here


      Powertrain > Cruise Control > Clear DTCs

    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.

    3. Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      Result
      Result Proceed to
      DTC P163181 is not output A
      DTC P163181 is output B

    A

    END (ECM WAS DEFECTIVE)

    B

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here