ECD SYSTEM (for CCo), Diagnostic DTC:P1625

DTC Code DTC Name
P1625 Idle Signal Transmitter Circuit

DESCRIPTION

The ECM reduces injector operation speed and applied voltage to the injector to reduce the sound it produces during idling. To do this, the ECM outputs applied voltage switching signals to terminal IJEN of the EDU from terminal IDLO of the ECM.

P1625
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Warm up the engine and idle it for 5 seconds

Either condition is met:


  • With the engine running at idle, voltage of the ECM IDLO terminal is 0.05 V or less for 5 seconds or more (1 trip detection logic).

  • With the engine running at speeds higher than idle, voltage of the ECM IDLO terminal is 3.4 V or higher for 5 seconds or higher (1 trip detection logic).

  • Open or short in idle control circuit

  • EDU

  • ECM

WIRING DIAGRAM

A003DVZE01

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (EDU - ECM)


    1. A003EJEE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to EDU)
      *2

      Front view of wire harness connector

      (to ECM)

      Disconnect the EDU connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      B69-2 - B39-62 (ILDO) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B69-2 or B39-62 (ILDO) - Body ground Always 10 kΩ or higher

    4. Reconnect the EDU connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  2. REPLACE EDU


    1. Replace the EDU Click here.


    NEXT

  3. CHECK ANY OTHER DTCS OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      P1625 is output B

    B

    REPLACE ECM Click here

    A

    END

  4. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  5. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  6. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. After warming up the engine, idle the engine for 5 seconds or more.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Confirm that the DTC is not output again.


    NEXT

    END