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 when the dynamic radar cruise control is operating. Therefore, if the skid control ECU 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 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 for approximately 1 second or more.

  • CAN communication system

  • ECM

  • Skid control ECU (brake actuator assembly)*1

  • Skid control ECU assembly*2

CAUTION / NOTICE / HINT

Note

Before replacing the ECM, refer to Service Bulletin.

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 OK
      CAN communication system DTCs are output NG

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  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 with a new one.

      for 8GR-FKS: Click here

      for V35A-FTS: 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

    B

    REPLACE SKID CONTROL ECU for LHD with Vacuum Brake Booster: Click here
    REPLACE SKID CONTROL ECU for RHD with Vacuum Brake Booster: Click here
    REPLACE SKID CONTROL ECU w/o Vacuum Brake Booster: Click here