EMISSION CONTROL SYSTEM


  1. CONSTRUCTION


    1. A semiconductor type air injection control driver is used. Activated by the ECM, this driver actuates the air pump assembly and the air switching valve assembly.

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

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

      A019R0RE02

      Figure 1. DI Terminal Output

      A019QMEE01
      Output (Duty Cycle Signal) Condition AIRP AIRV
      (1) Open circuit in line between AIDI and DI terminals - -
      (1) Failure in line between ECM terminals and air injection control driver - -
      (2) Output failure at air injection control driver (Failure in air pump assembly actuation circuit) - -
      (3) Output failure at air injection control driver (Failure in air switching valve assembly actuation circuit) - -
      (4) Overheat failure of air injection control driver - -
      (5) Normal On On
      (6) Normal Off Off
      On Off
      Off On