ECD SYSTEM CHECK MODE PROCEDURE

Tech Tips

Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect the same malfunctions that normal mode can.

In check mode, the ECM will detect faults and set DTCs more effectively than in normal mode.

Note

All the stored DTCs and freeze frame data are erased if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned from ON to ACC or off during check mode.

Before changing modes, always check and note any stored DTCs and freeze frame data.


  1. CHECK MODE PROCEDURE


    1. Turn the ignition switch off.

    2. Make sure that the vehicle is in the following conditions:


      1. Battery voltage is 18 V or more.

      2. Accelerator pedal is not depressed.

      3. Parking brake is released.

      4. Shift lever is in the neutral position.

      5. A/C switch is off.

    3. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch to ON.

    6. Turn the tester on.

    7. A01CGVJE06

      Enter the following menus: Powertrain / Engine and ECT / Utility / Check Mode.

    8. Make sure that the MIL flashes as shown in the illustration.

    9. Start the engine (the MIL should turn off).

    10. Simulate the conditions of the malfunction described by the customer.

    11. Check the DTC(s) and freeze frame data using the intelligent tester.

    12. After checking for DTCs, inspect the appropriate circuits Click here.