ECD SYSTEM > 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. When using 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.CONDUCT VISUAL INSPECTION

          NEXT


          7.SET CHECK MODE DIAGNOSIS*

            NEXT


            8.CONFIRM PROBLEM SYMPTOMS

              HINT:
              If the engine does not start, perform steps 10 and 12 first.

              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*

              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:
                1. Engine difficult to start or stalling (Click here).
                2. Black smoke emitted (Click here).
                3. Rough idling or excessive engine vibration (Click here).
                4. Engine knocking or rattling (Click here).
                5. Lack of power or hesitation (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
                  Malfunction not confirmed
                  		A
                  Malfunction 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

                          1. When not using intelligent tester:


                          1.VEHICLE BROUGHT TO WORKSHOP

                            NEXT


                            2.CUSTOMER PROBLEM ANALYSIS

                              NEXT


                              3.CHECK AND CLEAR DTC

                                NEXT


                                4.CONFIRM PROBLEM SYMPTOMS

                                  Result:
                                  Result
                                  		Proceed to
                                  Malfunction occurs
                                  		A
                                  Malfunction does not occur
                                  		B



                                		B.
                                SIMULATE SYMPTOM
                                A


                                5.CHECK DTC

                                  Result:
                                  Result
                                  		Proceed to
                                  Malfunction code
                                  		A
                                  No malfunction code
                                  		B



                                		 B.
                                Go to step 7
                                A


                                6.REFER TO DTC CHART

                                  NEXT

                                  Go to step 9


                                  7.CONDUCT BASIC INSPECTION

                                    Result
                                    		Proceed to
                                    Malfunctioning not confirmed
                                    		A
                                    Malfunctioning parts confirmed
                                    		B



                                  		B.
                                  Go to step 12
                                  A


                                  8.REFER TO PROBLEM SYMPTOMS TABLE

                                    HINT:
                                    1. Engine difficult to start or stalling (Click here).
                                    2. Black smoke emitted (Click here).
                                    3. Rough idling or excessive engine vibration (Click here).
                                    4. Engine knocking or rattling (Click here).
                                    5. Lack of power or hesitation (Click here).

                                    Result
                                    		Proceed to
                                    Malfunctioning circuit confirmed
                                    		A
                                    Malfunctioning parts confirmed
                                    		B


                                  		B.
                                  Go to step 12
                                  A


                                  9.CHECK ECM POWER SOURCE CIRCUIT

                                    NEXT


                                    10.CONDUCT CIRCUIT INSPECTION

                                      Result
                                      		Proceed to
                                      Malfunction not confirmed
                                      		A
                                      Malfunction confirmed
                                      		B



                                    		B.
                                    Go to step 13
                                    A


                                    11.CHECK FOR INTERMITTENT PROBLEMS

                                      NEXT

                                      Go to step 13


                                      12.CONDUCT PARTS INSPECTION

                                        NEXT


                                        13.IDENTIFY PROBLEM

                                          NEXT


                                          14.ADJUST AND/OR REPAIR

                                            NEXT


                                            15.CONDUCT CONFIRMATION TEST

                                              NEXT

                                              END