DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1617

DTC Code DTC Name
P1617 Distance Control ECU Malfunction

DESCRIPTION

In the dynamic radar cruise control system, the ECM and driving support ECU communicate with one another to control the system based on certain designation information. If the designation information of the ECM and driving support ECU are different or the driving support ECU is malfunctioning, this DTC is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

P1617

Distance Control ECU Malfunction

While the vehicle speed is 50 km/h (30 mph) or more with the cruise control switch on, a designation signal from the ECM and a designation return signal from the driving support ECU do not match or the driving support ECU is malfunctioning for 0.3 seconds or more.

  • Driving support ECU

  • ECM

CAUTION / NOTICE / HINT

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 engine switch on (IG).

      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 engine switch off.

    Result

    Result

    NEXT
    NEXT

  2. CHECK FOR DTC

    1. Clear the DTCs

      Click here

      Powertrain > Radar Cruise > Clear DTCs

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

      Tip:

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

      1. Drive the vehicle at a speed of 50 km/h (30 mph) or more.

      2. Turn the cruise control switch on.

    3. Check for DTCs

      Click here

      Powertrain > Radar Cruise > Trouble Codes

    OK

    DTC P1617 is not output.

    Result

    Result

    OK

    NG
    OK

    END

    NG

  3. REPLACE DRIVING SUPPORT ECU

    1. Replace the driving support ECU

      Click here

    Result

    Result

    NEXT
    NEXT

  4. CHECK FOR DTC

    1. Clear the DTCs

      Click here

      Powertrain > Radar Cruise > Clear DTCs

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

      Tip:

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

      1. Drive the vehicle at a speed of 50 km/h (30 mph) or more.

      2. Turn the cruise control switch on.

    3. Check for DTCs

      Click here

      Powertrain > Radar Cruise > Trouble Codes

      OK

      DTC P1617 is not output.

    Result

    Result

    OK

    NG
    OK

    END (DRIVING SUPPORT ECU IS DEFECTIVE)

    NG

    REPLACE ECM

    Click here