ECD SYSTEM (w/ EGR Cooler) > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here


HINT:
  1. Use these procedures to troubleshoot the ECD system.
  2. *: Use the intelligent tester.


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CUSTOMER PROBLEM ANALYSIS

      NEXT


      3.CONNECT INTELLIGENT TESTER TO DLC3*

        HINT:
        If the display indicates a communication fault with the tester, inspect the DLC3.

      NEXT


      4.CHECK DTC AND FREEZE FRAME DATA*

        HINT:
        Record or print DTCs and freeze frame data if necessary.

      NEXT


      5.CLEAR DTC AND FREEZE FRAME DATA*

        NEXT


        6.VISUAL INSPECTION

          NEXT


          7.SET CHECK MODE DIAGNOSIS*

          1. Refer to the check mode procedure (Click here)


          NEXT


          8.CONFIRM PROBLEM SYMPTOMS

            HINT:
            If the engine does not start, first perform the "CHECK DTC" procedures and "BASIC INSPECTION" procedures below.

            Result:

            Result
            		Proceed to
            Malfunction occurs
            		A
            Malfunction does not occur
            		B


          		B.
          SIMULATE SYMPTOMS
          A


          9.CHECK DTC

            Result:

            Result
            		Proceed to
            Malfunction code
            		A
            No malfunction code
            		B


          		 B.
          Go to step 11
          A


          10.REFER TO DTC CHART*

          1. Refer to the diagnostic trouble code chart (Click here)


          NEXT

          Go to step 13


          11.CONDUCT BASIC INSPECTION

            Result:

            Result
            		Proceed to
            Malfunctioning parts not confirmed
            		A
            Malfunctioning parts confirmed
            		B


          		B.
          Go to step 16
          A


          12.REFER TO PROBLEM SYMPTOMS TABLE

            HINT:
            If the customer's problem description is applicable to one of the following problems, refer to the troubleshooting on the pages shown below:

            Symptom
            		Condition
            		See page
            Engine difficult to or stalling
            1. Engine difficult to start with cold engine
            2. Engine difficult to start with warm engine
            3. Engine stalls soon after starting
            4. Any condition other than those listed above
            		 Click here
            Black smoke emitted
            1. When idling
            2. When driving
            		 Click here
            Rough idling or excessive engine vibration
            1. Abnormal initial idling
            2. High engine idling speed
            3. Low engine idling speed
            		 Click here
            Lack of power or hesitation
            1. Hunting with cold engine
            2. Hunting with warm engine
            3. Surging with cold engine
            4. Surging with warm engine
            5. Poor acceleration
            6. Poor driveability
            		 Click here
            Engine knocking or rattling
            1. When idling
            2. When driving
            		 Click here

            Result:

            Result
            		Proceed to
            Malfunctioning circuit confirmed
            		A
            Malfunctioning parts confirmed
            		B


          		B.
          Go to step 16
          A


          13.CHECK ECM POWER SOURCE CIRCUIT

            NEXT


            14.CONDUCT CIRCUIT INSPECTION

              Result:

              Result
              		Proceed to
              Malfunctioning circuit confirmed
              		A
              Malfunctioning parts confirmed
              		B


            		B.
            Go to step 17
            A


            15.CHECK FOR INTERMITTENT PROBLEMS

              NEXT

              Go to step 18


              16.CONDUCT PARTS INSPECTION

                NEXT


                17.IDENTIFY PROBLEM

                  NEXT


                  18.ADJUST AND/OR REPAIR

                    NEXT


                    19.CONDUCT CONFIRMATION TEST

                      NEXT

                      END