DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1616

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

DESCRIPTION

The ECM is the only component that has a function to store and output 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 Code DTC Detection Condition Trouble Area
P1616 While the vehicle speed is 50 km/h (31 mph) or more with the cruise control switch on, the ECM continuously receives a logical error signal from the driving support ECU for 1 second.

  • ECM

  • Driving support ECU

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CONFIRM DESIGNATION INFORMATION


    1. Confirm the designation information.


      1. Turn the ignition switch to ON.

      2. Turn the cruise control switch on.

      3. With the brake pedal depressed, push the cruise control switch to +RES 3 times within 3 seconds. Check that the skid control buzzer sounds at this time.

        OK
        The skid control buzzer sounds (initialization is performed).

        Note


        • Do not turn the light control switch on at this time as doing so causes the beam axis to deviate. If the light control switch is turned on by mistake, readjust the beam axis Click here.

        • If initialization cannot be performed, first inspect the stop light switch circuit, cruise control switch circuit and skid control buzzer circuit.

      4. Turn the ignition switch off.


    NEXT

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

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

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.


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

      2. Turn the cruise control switch on.

    3. Check for DTCs Click here.

      OK
      DTC P1616 is not output.

    NG

    REPLACE ECM Click here

    OK

    END

  3. REPLACE ECM


    1. for 1GR-FE:

      Replace the ECM Click here.

    2. for 1KD-FTV:

      Replace the ECM Click here.


    NEXT

  4. CHECK FOR DTC


    1. Clear the DTCs Click here.

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

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.


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

      2. Turn the cruise control switch on.

    3. Check for DTCs Click here.

      OK
      DTC P1616 is not output.

    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

    END (ECM IS DEFECTIVE)