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DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1616

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DTC Code DTC Name
P1616 Communication Error from ECM to Distance Control ECU
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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 driving support 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 driving support 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 driving support ECU for more than a specific amount of time, the ECM records this logical error code

  • ECM

  • Driving support ECU
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INSPECTION PROCEDURE

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PROCEDURE


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    REPLACE ECM


    1. Replace the ECM (for 2GR-FE) (Click here).


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    CHECK DTC


    1. Clear the DTCs (Click here).

    2. Perform the following to make sure that the DTC detection conditions are met.

      Tip:

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


      1. Drive the vehicle at a speed of 50 km/h (31 mph) or more.

      2. Turn the cruise control main switch on.

    3. Check for DTCs (Click here).

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

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    END

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    REPLACE DRIVING SUPPORT ECUClick here