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EC-4                       EMISSION CONTROL (5VZ-FE)       -   POSITIVE CRANKCASE VENTILATION (PCV)
                                                               SYSTEM


  PCV Valve                                    POSITIVE CRANKCASE
                                               VENTILATION (PCV) SYSTEM                                      EC00M-03


                                               INSPECTION
                                               1.    INSPECT PCV VALVE
                                               (a)   Remove the PCV valve.
                                                     (1) Disconnect the PCV hose from the PCV valve.
                                                     (2) Remove the PCV valve.
                                      S02094
                                               (b)   Install a clean hose to the PCV valve.

                                               (c)  Inspect the PCV valve operation.
           Cylinder Head Cover Side
                                                    (1) Blow air into the cylinder head cover side, and
                                                          check that air passes through easily.
                                               CAUTION:
       Clean Hose                              Do not suck air through the valve. Petroleum substances
                                               inside the valve are harmful.



                                      P21212



                                                     (2)       Blow air into the air intake chamber side, and check
                         Air Intake
                                                               that air passes through with difficulty.
                         Chamber Side




                                      P21213



                                                     (3)    Blow air into the air intake chamber side when lift
                          Air Intake                       up the inside valve, and check that there is a strong
                          Chamber Side                     resistance to air flow.
                                               If operation is not as specified, replace the PCV valve.
                                               (d) Remove the clean hose from the PCV valve.
                                               (e) Reinstall the PCV valve.



                                      P21214



                                               2.   INSPECT HOSES, CONNECTIONS AND GASKETS
                                               Visually check for cracks, leaks or damage.




                                      P21676



2002 4RUNNER (RM887U)

                                                                      Author :             Date :              921

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