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Home >> Acura >> 2012 >> MDX >> Repair and Diagnosis >> Engine Performance >> System >> Fuel And Emissions Systems >> How to Set Readiness Codes >> Evaporative Emission (EVAP) Control System Monitor and Readiness Code >> Procedure
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Evaporative Emission (EVAP) Control System Monitor and Readiness Code: Procedure

  1. Connect the HDS to the DLC.
  2. Start the engine.
  3. Select EVAP TEST in the INSPECTION MENU with the HDS, then select the FUNCTION TEST in the EVAP TEST MENU.
    • If the result is normal, readiness is complete.
    • If the result is not normal, go to the next step.
  4. Check for a Pending DTC. If there is no DTC, one or more of the enable criteria were probably not met; repeat the procedure.


  1. Start the engine.
  2. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. During the drive, decelerate (with the throttle fully closed) for 5 seconds. After about 3.5 miles (5.6 km), the readiness code should switch from incomplete to complete.
  3. Check the readiness codes screen for the AIR FUEL RATIO (A/F) SENSOR in the DTCs MENU with the HDS.
    • If the screen shows complete, readiness is complete.
    • If the screen shows not complete, go to the next step.
  4. Check for a Pending DTC. If there is no DTC, the enable criteria was probably not met. Select the DATA LIST MENU. Check ECT SENSOR 1 in the ALL DATA LIST with the HDS. If ECT SENSOR 1 is less than 140 ° F (60°C), run the engine until it is more than 140°F (60°C), then repeat the procedure.
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