DYNAMIC RADAR CRUISE CONTROL SYSTEM(except 2AR-FE), 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 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 While the ignition switch is ON and the dynamic radar cruise control system is operating, the ECM continuously receives a logic error signal from the skid control ECU (brake actuator assembly) for approximately 1 second or more.

  • Vehicle stability control system

  • ECM

CAUTION / NOTICE / HINT

Note


  • 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

  • Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check for DTCs.


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    A

  2. CHECK FOR DTCs (CRUISE CONTROL SYSTEM)


    1. Clear the DTCs.


      Powertrain > Cruise Control > Clear DTCs

    2. Perform the following procedure.

      Tech Tips

      If the following procedure is not performed, the previously output DTC cannot be detected.


      1. Turn the ignition switch to ON.

      2. Turn the dynamic radar cruise control system on using the cruise control main switch.

      3. Wait for 1 second or more.

    3. Check for DTCs.


      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

    REPLACE ECM for A25A-FKS: Click here
    REPLACE ECM for 2GR-FKS: Click here