DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1630

DTC Code DTC Name
P1630 Communication Error from VSC to ECM

DESCRIPTION

The skid control ECU sends signals such as cruise control cancel signals and brake demand response signals to the ECM when the dynamic radar cruise control system is operating.

DTC No. Detection Item DTC Detection Condition Trouble Area
P1630 Communication Error from VSC to ECM While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating (vehicle-to-vehicle distance control mode), if communication data from the skid control ECU is logically inconsistent for approximately 0.5 seconds or more.

  • Communication circuit

  • Skid control ECU (brake actuator assembly)*1

  • Skid control ECU (master cylinder solenoid)*2

  • ECM

*1: for Vacuum brake booster

*2: for Hydraulic brake booster

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 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

      Result
      Proceed to
      OK
      NG

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. REPLACE SKID CONTROL ECU


    1. Replace the skid control ECU.

      for Vacuum Brake Booster: Click here

      for Hydraulic Brake Booster (for LHD): Click here

      for Hydraulic Brake Booster (for RHD) Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTCs


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Clear the DTCs.

      Click here

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

      Tech Tips

      If the detection conditions are not met, the malfunction cannot be detected.

    5. Check for DTCs.

      Click here

      Result
      Result Proceed to
      DTC P1630 is not output A
      DTC P1630 is output B

    A

    END

    B

    REPLACE ECM for 1GR-FE: Click here
    REPLACE ECM for 1KD-FTV: Click here
    REPLACE ECM for 1GD-FTV: Click here
    REPLACE ECM for 2TR-FE: Click here