Gasoline Engines, Performing Emissions Test
The following description applies to vehicles that are equipped with a catalytic converter regulated by "On - Board - Diagnostic" OBD.
OBD monitors all components and partial systems that influence the emissions quality.
Special tools and workshop equipment required
An emissions test is only possible when all units of the Emissions Testing Station:VAS 6300 are connected properly according to operating instructions and are connected to each other.
All procedures are displayed on the Emissions Testing Station:VAS 6300 .
Test Requirements
- All of the test conditions and data required for the emissions test are on the emissions testing data sheet for the corresponding engine.
- If a barcode input of the emissions testing specification data is going to be performed, the emissions testing data sheet must be available as a paper printout.
- Automatic transmission: selector lever in "P" or "N" position.
- Manual transmission: gearshift lever in neutral.
- Parking brake applied
-- Follow the instructions in the display.
Start Screen
-- Select the "Emissions test" button -arrow-.
An overview for selecting the respective emissions test type appears.
-- Select "Emissions testing, gasoline" -arrow-.
Display for the warm-up time appears.
-- Continue the emissions test according to the instructions on the display.
-- When the selection for the emissions test specified value appears, select the corresponding "Selection for emissions test specified value" -arrow-.
- Either for a first-time emissions test "Standard specification values",
- Or, if an already performed emissions test is to be performed again "last vehicle".
-- Select Continue -item 1- on the display.
Vehicle Data Input
The vehicle data input menu appears.
-- Enter the following data from part 1 of the certificate of registration.
- -1- Vehicle manufacturer: "for example, AUDI"
- -2- Vehicle model: "for example, A6 / 4G"
- -3- Key number for 14.1: "for example, 0572"
- -4- Key number for 2.1: "for example, 0588"
- -5- Key number for 2.2: "for example, 846"
- -6- Engine code "for example, CHVA"
- -7- License plate: "for example, IN-MV 1234"
- -8- VIN: "for example, WAUZZZ4GZAN001234"
-- Enter the odometer reading "for example, 33350" at -item 9-.
Use the GO TO button to start other functions.
Use the GO TO button to cancel the test.
-- Select "with OBD" -arrow-.
Emissions Test Specified Data Input
If the specified values are not available as a bar code, they must be entered manually.
For all test conditions and data required for the emissions test. Refer to the appropriate Service Information for the corresponding engine.
Manual Emissions Test Specified Data Input
-- Follow the instructions on the display for manual data input.
-- Enter the values on the emissions testing data sheet under "Test values for the emissions test" on the display in the following order:
- Test RPM (Idle Speed)
- Warm-Up Time for Catalytic Converter
- Engine Temperature
- Increased Idle Speed
- CO Content at Increased Idle
- Oxygen in Increased Idle
- Idle Speed
- Select the upstream oxygen sensor type, either >>switching sensor<< or >>broadband sensor<< -item 1-.
- Heated Oxygen Sensor Value
-- Press the Continue button -arrow- if all the data was entered correctly.
Emissions Test Specified Data Input as Barcode
-- If the emissions test specified data is available as a bar code, scan in the bar code of emissions testing data sheet using bar code reader.
Screen containing all required data appears on the display.
-- Press the → button -arrow- to continue.
Visual inspection
-- Follow the instructions on the display.
-- Visually inspect all emissions-related components.
-- Check the exhaust system for completeness, leaks and damage.
-- If the visual inspection is OK, press the "OK" button -arrow-.
A test starts by pressing the NOT OK button.
Diagnostic Connector, Connecting
In the visual inspection display, the prompt to connect the diagnostic connector -arrow A- and to check the malfunction indicator lamp (MIL) -arrow B- appears.
-- Follow the instructions on the display -arrow A- and -arrow B-.
-- Switch off the ignition.
-- Connect the diagnostic cable connector to the EOBD connection.
Visual Inspection of the malfunction indicator lamp with engine off
-- Switch the ignition on.
-- Visually inspect the "Malfunction Indicator Lamp".
-- When the lamp turns on, press the "Lamp ON" button -arrow C-.
If the malfunction indicator lamp does not come on during the visual inspection, the result of the emissions test is "failed".
Visual Inspection of Malfunction Indicator Lamp with Engine Running
-- Start the engine and confirm the engine is running via "Yes" on the display.
-- Visually inspect the "malfunction indicator lamp". The lamp must not come on any more or blink.
-- Guide the exhaust probe into the tail pipe.
The emissions test procedure only continues when the test probe is positioned in the tail pipe.
The program automatically advances to the test-readiness check.
Here it is tested whether all test-readiness checks supported by the control module have been run through.
-- Confirm the "malfunction indicator lamp" status -arrow-.
If all display values are set to zero, no control sensor test is performed.
If not all display values are set to zero, a control sensor test will be performed later.
Catalytic Converter Conditioning
The program automatically advances to the warm-up phase of the catalytic converter.
-- Follow the instructions on the display.
Measurement begins when engine speed has reached the necessary level.
-- Maintain the engine speed in the required RPM range.
The remaining time for performing the pre-heating phase is displayed -arrow A-.
Warm-Up Time
The program automatically advances to the display for measuring the engine temperature.
-- Follow the instructions on the display.
This display only appears if the engine temperature has not yet reached 80 °C (176 °F).
-- Bring the engine up to the required temperature.
Measurement at Increased Idle Speed
The program automatically advances to the display for the measurement at increased idle speed.
-- Follow the instructions on the display.
Measurement begins when engine speed has reached the necessary level.
Using the → button, the measurement can be skipped, that is, the emissions test will not be passed.
Using the ← button, the measured values are reset and the test can be repeated.
-- Maintain the engine speed in the required RPM range.
The remaining time for performing the measurement is displayed -arrow A-.
Idle Speed and CO Content Measurement
The program automatically advances to the display for idle speed and CO content.
Measurement begins when engine speed has reached the necessary level.
The remaining time for performing the measurement is displayed -arrow A-.
Upstream Oxygen Sensor Test
The upstream oxygen sensor test runs slowly, only performed when all display values are "NOT" set to zero during the test-readiness check.
The program automatically advances to the display for the upstream oxygen sensor test.
The upstream oxygen sensor test is performed separately for each oxygen sensor.
Measurement begins when engine speed has reached the necessary level.
-- Maintain the engine speed in the required RPM range.
The remaining time for performing the measurement is displayed -arrow A-.
Evaluation
After the emissions test is completed, the log is displayed on the screen.
The test result is displayed.
Explanations regarding the emission test can be entered here -arrow A- and can be entered into the test report.
-- If the emissions test was passed, select "Grant emissions test certificate" and the date in the dropdown menu -arrow B-.
-- Then confirm with "Yes" -arrow C-.
Printing
After confirming, the two "TEST CERTIFICATES" are printed out automatically.
-- If another test certificate is required, press the "Print" button -arrow A-.
-- Follow the instructions on the display.
-- Remove the exhaust probe from the tail pipe.
-- Then press the → button -arrow B-.
The emissions test is completed. A new emissions test can be performed.