Check Test Equipment Calibration

^ Verify the correctness of procedures used in the Exhaust Emission Test.

^ Determine if the test equipment has been damaged, tampered with, or misused by unqualified personnel.

^ Check the maintenance records on the test equipment. Note any instances of prior malfunction, age of equipment, and the expiration date of the current certification period.

^ Check the subject vehicle exhaust gas quality using other available equipment.

^ Does the vehicle pass the Exhaust Emission Test on the alternate equipment?

YES -- End of testing; Submit the original equipment for repair and recertification.

NO -- Go to Perform Vacuum Test. Perform Vacuum Test