EMISSION CONTROL SYSTEM


  1. OPERATION


    1. The air injection control driver is a non-contact type relay that uses semiconductors. Activated by the ECM, this driver actuates the air pump and the air switching valve.

    2. The air injection control driver also detects failures in the input and output circuits at the air injection control driver and transmits the failure status to the ECM via duty cycle signals.

    3. For details on the control of the air injection control driver, see the following system chart:

      B002MTPE01
      DI Terminal Output
      Condition AIRP AIRV Output (Duty Cycle Signal)
      Open circuit in line between AIDI and DI terminals. - - B002NHOE01
      Failure in line between ECM terminals and air injection control driver. - - B002NHOE01
      Output failure at air injection control driver. (Failure in air pump actuation circuit) - - B002N6WE01
      *1 200 ms
      *2 Duty 20%
      Output failure at air injection control driver. (Failure in air switching valve actuation circuit) - - B002MTQE01
      *1 Duty 40%
      Failure of air injection control driver caused by overheating. - - B002N2PE01
      *1 Duty 60%
      Normal On On B002N7GE01
      *1 Duty 80%
      Off Off B002NFZE01
      On Off
      Off On