DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1616

DTC Code DTC Name
P1616 Communication Error from ECM to Distance Control ECU

DESCRIPTION

The ECM receives signals from each sensor and ECU, then sends signals such as A/T signals, cruise control operation signals, low speed operation signals, brake control operation signals, and radar light emission prohibiting signals, to the distance control ECU. The ECM is the only component that has a function to record and output the DTCs in the dynamic radar cruise control system. Therefore, if the distance control ECU detects a communication error from the ECM, it sends a malfunction signal back to the ECM.

DTC No. DTC Detection Condition Trouble Area
P1616 While the dynamic radar cruise control is either preparing for operation or operating, if the ECM continuously receives a logical error signal from the distance control ECU for more than a specific amount of time, the ECM records this logical error code

  • ECM

  • Distance control ECU

INSPECTION PROCEDURE

Note

When the distance control ECU or ECM is replaced with a new one, initialization must be performed Click here.

PROCEDURE


  1. REPLACE ECM


    1. Replace the ECM (for 2UR-GSE) Click here.


    NEXT

  2. CHECK DTC


    1. Clear the DTC Click here.

    2. Turn the cruise control main switch on.

    3. Drive the vehicle at the require speed (45 km/h (27 mph) or higher).

    4. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC P1616 is not output A
      DTC P1616 is output B

    B

    REPLACE DISTANCE CONTROL ECU Click here

    A

    END