AIR CONDITIONING SYSTEM > HOW TO PROCEED WITH TROUBLESHOOTING

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The intelligent tester can be used in steps 2, 5, 6, 7 and 10.


1.VEHICLE BROUGHT TO WORKSHOP

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    2.CHECK AND CLEAR DTCS

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      3.PROBLEM SYMPTOM CONFIRMATION


        		.
        SYMPTOM DOES NOT OCCUR (GO TO STEP 4)

        		.
        SYMPTOM OCCURS (GO TO STEP 5)

        4.SYMPTOM SIMULATION

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          5.CHECK BODY MULTIPLEX COMMUNICATION SYSTEM

          1. Check for DTC outputs.



          		.
          MULTIPLEX DTC OUTPUT (PROCEED TO "BODY MULTIPLEX COMMUNICATION SYSTEM")

          		.
          NO MULTIPLEX DTC (GO TO STEP 6)

          6.CHECK CAN COMMUNICATION SYSTEM


            		.
            CAN DTC OUTPUTS (PROCEED TO "CAN COMMUNICATION SYSTEM")

            		.
            NO CAN DTC (GO TO STEP 7)

            7.DTC CHECK (OTHER THAN MULTIPLEX DTC)


              		.
              TROUBLE CODE (GO TO STEP 8)

              		.
              NORMAL SYSTEM CODE (GO TO STEP 9)

              8.DTC CHART


                		.
                GO TO STEP 10

                9.PROBLEM SYMPTOMS TABLE

                  NEXT


                  10.ACTUATOR CHECK

                    NEXT


                    11.CIRCUIT INSPECTION

                      NEXT


                      12.TERMINALS OF ECU

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                        13.IDENTIFICATION OF PROBLEM

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                          14.REPAIR OR REPLACE

                            NEXT


                            15.CONFIRMATION TEST

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                              END