The Two-Speed Idle (TSI) emissions test is used in a low enhanced inspection and maintenance (I/M) program. The analyzer certified by TCEQ during the two-speed idle test measures the tailpipe exhaust emissions of a vehicle while the vehicle idles at both high and low speed. This chapter describes the procedures used by certified inspectors in performing the Two-Speed Idle (TSI) vehicle emissions inspection on designated vehicles where the TSI test is required.
The TSI analyzer meets BAR ’96 two-speed idle specifications and tests vehicles for carbon dioxide in addition to hydrocarbons and carbon monoxide. The TSI test comprises two phases: (1) high speed test (2200 – 2800 RPMs) for the first phase of the emissions test; then, (2) tested at idle (350 – 1200 RPMs) followed by a gas cap integrity test that meets EPA-required specifications and procedures.
1. A four-gas analyzer and gas cap tester approved by the Texas Commission on Environmental Quality (TCEQ) appropriate for the I/M program in that county.
2. Approved calibration gases for the analyzer.
3. A designated telephone line dedicated solely for each analyzer in the program.
4. An adequate supply of printer supplies.
5. All required analyzer manuals.
6. A business arrangement with the Texas Information Management Systems (TIMS) contractor to obtain a telecommunications link to the Vehicle Information Database (VID).
Note: If the inspection station fails to pay its data link fees to the contractor, then the analyzer will be locked out from any further inspections until the problem is resolved.
All certified emissions inspection stations must report the results of emissions testing, since the collection and reporting of accurate vehicle emissions testing data is of significant importance to the inspection and maintenance (I/M) program.
Each analyzer is allowed a certain number of off-line inspections since occasional telephone line problems may occur. After restoration of the telephone link, the off-line data will be sent to the VID. However, when the analyzer exceeds the off-line inspection limit, the analyzer will be locked out from any further inspections until the problem is resolved. Failure to reestablish the telecommunications link to the VID will result in either suspension or revocation of the inspection station license.
In the Austin and El Paso I/M program areas, the TSI emissions inspection is used for designated vehicles not originally equipped with OBDII, or as the default tailpipe emissions inspection in cases where an OBDII vehicle is authorized to default to this tailpipe emissions test. This chapter is applicable in the following counties:
1. El Paso,
2. Travis, and
TSI emissions testing must be performed on all motor vehicles in the above counties that are:
1. capable of being powered by gasoline (except motorcycles),
2. model years 1995 and older, to and including twenty-four (24) years old,
3. presented for annual safety inspection, or
4. required by state law.
Note: Examples of “required by state law” are:
1. Department of Public Safety directs that a vehicle receive an out-of-cycle emissions test,
2. vehicle requires an emissions test on resale, or
3. a public college or university requires emissions testing prior to issuance of a school parking permit.
TSI emissions inspections will be performed on other vehicles as the Department of Public Safety shall direct.
1. Safety only,
2. Two-year Safety (new car and light duty trucks),
3. Safety and emissions,
4. Emissions only,
5. Federal Motor Carrier Safety Regulations (commercial inspections for windshield or trailer), and
The “Safety and Emissions Certificate” specified by the department for the TSI inspection will be issued to vehicles passing the safety and TSI emissions inspection, with the following exception: vehicles qualifying under DPS rules for a “unique emissions-test-only inspection certificate.” These vehicles are exempt from the annual safety inspection or not required to be emissions tested at the time of the safety inspection. Specifically, a unique emissions-test-only inspection certificate may be issued to:
1. Federal Vehicles (not registered in Texas). Federal government or quasi-governmental agency vehicles that are primarily operated in affected counties, but do not display Texas license plates, are exempt from the annual safety inspection; however, they shall be required to comply with all vehicle emissions requirements.
2. Out-of-State Registered Vehicles (for out-of-state registration purposes only). Vehicles registered in another state, that require an emissions test for registration purposes in that state, may be emissions tested and issued a unique emissions-test-only inspection certificate.
3.Commercial Motor Vehicles Requiring an Emissions Test. A motor vehicle requiring a Federal Motor Carrier Safety Inspection, that meets the definition of a “designated vehicle,” must pass an emissions inspection and display a unique emissions-test-only inspection certificate on the lower left-hand corner of the windshield, immediately above the registration certificate, prior to receiving a commercial motor vehicle safety inspection certificate. The commercial motor vehicle safety inspection certificate must be issued within 15 calendar days of the issuance of the unique emissions-test-only inspection certificate. The inspector shall not remove the unique emissions–test-only certificate when the new commercial inspection certificate is issued.
4. College Students Away from Home.
a. A vehicle registered in an affected county, operated by a college student that was issued a safety-only inspection certificate in a non-affected county, and upon return to the affected county who requests an emissions-only inspection.
b. A vehicle registered in a non-affected county or out of state, operated by a college student where the public institution of higher learning is located in affected county and requires vehicles to be emissions tested as a condition to receive a permit to park or drive on the grounds of the institution.
5. A vehicle with valid inspection certificate, either safety only or safety and emissions, directed by DPS to undergo an emissions inspection (usually as a result of DPS on-road emissions testing).
6. Only the fee for the emissions test will be charged for emissions test performed on the vehicles listed above.
NOTE: All unique emissions-test-only inspection certificates expire at the same time the safety-only inspection certificate expires or the last day of the month indicated on the back of the certificate and year indicated by the hole punch on the unique emissions-test-only inspection certificate, or whichever occurs first.
Order of Inspection:
1. If necessary, prepare the analyzer for testing.
a. Leak checks and gas cap calibrations are required every 24 hours. Leak checks may only be performed by capping the ends of the probe. If the analyzer fails the leak check or gas cap calibration test, no inspection may be performed until the problem is repaired.
b. Gas calibrations are required every 72 hours.
2. Enter the inspector access code.
3. Select type of inspection performed from menu on analyzer.
4. Follow the screen prompts, answering questions and entering required data.
a. The inspector must enter all required information as accurately and correctly as reasonably possible. Incorrect information may cause inaccurate results.
b. Any vehicle information displayed on the analyzer screen that is incorrect will be corrected by the inspector before continuing to the next screen.
5. Conduct a complete safety inspection, if required.
6. Conduct a complete emissions inspection as prompted by the analyzer. The inspection sequence will be displayed on the analyzer screen and must be followed.
NOTE: Vehicles that are too large to fit into a standardized inspection bay will be inspected outside the building as close to the analyzer as possible, in an area approved by a department representative.
7. The exhaust probe must be inserted in the vehicle tailpipe. If the vehicle has dual exhausts, both tailpipes must be probed.
8. The analyzer must display a RPM reading for the vehicle being tested. The high-speed reading must be between 2200 RPM and 2800 RPM. The low-speed reading must be between 350 RPM and 1200 RPM. Authority to bypass the RPM equipment may be granted only by the DPS or as required by the analyzer.
9. Gas Cap Testing. Every gasoline-powered vehicle from 2-24 model years old will be checked for presence of a gas cap and then tested by a department approved “gas cap testing device” to determine if the gas cap is defective. The following vehicles are exempt:
a. Antique vehicles.
b. Slow-moving vehicles.
d. Vehicles operated exclusively by a fuel other than gasoline.
e. Vehicles newer than two (2) years old and older than 24 years old.
A. Inspection Procedure.
a. Conduct daily calibration check of gas cap testing device.
b. Check for presence (all gas caps must be present).
c. Check for correct type of gas cap(s).
d. Remove gas cap(s) and test using an approved testing device. (Gas cap present but not testable will not be cause for rejection.)
e. Any gas cap(s) failing the initial test will be tested a second time to verify failure.
B. Inspect for and reject if:
a. Vehicle not equipped with required gas cap(s).
b. Vehicle not equipped with proper type gas cap(s).
c. Gas cap(s) fails both tests.
10. Emissions test results are automatically recorded as pass/fail.
11.If the vehicle passes the required inspection, the analyzer will prompt the inspector to enter the appropriate and complete certificate number (all letters and numbers), after which the appropriate certificate will be issued.
12. The inspector must give a copy of the test results to the motorist. The certified inspector conducting the test will sign the test results.
Texas Transportation Code, Section 548.053, states “if an inspection discloses the necessity for adjustment, correction, or repair, an inspection station or inspector may not issue an inspection certificate until the adjustment, correction, or repair is made.”
If a vehicle fails any item of inspection, the inspector shall enter the reason for rejection in the space provided on the rejection receipt (VI-7) by typing it in while the rejection receipt is displayed on the analyzer or by handwriting it in
after the rejection receipt is printed by the analyzer. The inspector shall verbally explain the reason for rejection and mark a large “X” on the back of the certificate currently displayed on the vehicle.
The inspector shall provide the motorist whose vehicle has failed the following:
1. Rejection receipt (VI-7),
2. Test results (VIR),
3. Vehicle Repair Form (VRF),
4. Brochure, “What to do if my vehicle fails the test”, and
5. A list of Recognized Emissions Repair Facilities of Texas.
NOTE: The inspection station is not required to mail the inspection log/report to DPS in Austin; however, the station is required to maintain a copy of the log/report for one year from the date of printing. Inspection stations performing “new car make ready” inspections resulting in the issuance of two-year inspection certificates will retain the log/reports including these inspections for a period of two years.
1. State lockout,
2. State disk drive tamper,
3. TAS cabinet tamper, and
4. Maximum test without communication.
Notify Gordon-Darby for lockouts resulting from:
Failure to pay communication fee to VID contractor.
Notify the analyzer manufacturer for lockouts resulting from:
1. Disk failure,
2. Gas calibration failure,
3. Hard drive failure,
4. Gas analyzer failure,
5. Leak check failure, or
6. Internal clock failure or warm-up failure.