Emissions Test, Gasoline Engines
Special tools and workshop equipment required
- Emissions Testing Station L :VAS 7320 A
The following description is based on vehicles that are equipped with "On Board Diagnostics", OBD.
OBD monitors all components and partial systems that influence the emissions quality.
An emissions test is only possible when all units of Emissions Testing Station are connected properly according to operating instructions and are connected to each other.
All procedures being performed are displayed on the Emissions Testing Station.
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.
- Paper printout of the emissions test data sheet must be available for reading the bar code.
- Automatic transmission: selector lever in "P" or "N" position.
- Manual transmission: gearshift lever in neutral.
- Parking brake applied
- 12V battery completely charged (too low of a charge may increase the idling speed).
- Hybrid vehicles: the emissions test must be performed on the internal combustion engine.
-- Perform emissions testing according to instructions in the display.
Vehicle Data Input
-- Enter the following data:
- License plate number
- Key number
- Vehicle Identification Number (VIN)
- Fuel type
- Odometer reading
The following vehicle data can be found in the certificate of registration part 1:
- License plate: "for example, WOB-HH 1234"
- Emissions key number. "Field 14.1 (Code for field 14)"
- Vehicle manufacturer: "Field 2,", "Field 2.1 (Code for field 2)"
- VIN: "Field E"
- Type and version "field D2 (type only)", "Field 2.2 (Code for field D.2)"
Emissions Test Specified Data Input
Specification data may be entered differently:
- 1. Manually
- 2. Via barcode input from emissions testing data sheet
- 3. through ELSA Web service
In order to be able to use ELSA web service, the Emissions Testing Station used for the emissions test must be integrated in the workshop network.
When using ELSA Web service, the vehicle specification data is automatically transferred via the network into the appropriate form.
Manual Emissions Test Specified Data Input:
All test requirements and data required for the emissions test can be found on Data sheets for exhaust emission test for the corresponding engine.
-- Follow the instructions on the display for manual data input.
-- Enter the indicated values on the emissions testing data sheet "test values for the emissions test" on the display in the following sequence:
- 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".
- Heated Oxygen Sensor Value
Emissions test specified data input as bar code:
-- 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.
Visual inspection
-- Visually inspect all emissions-related components.
-- Check the exhaust system for completeness, leaks and damage.
Procedure
If the hybrid vehicle starts in >>e-mode<<, then the internal combustion engine must be started for the emissions test.
-- Close the hood.
-- Sit in the vehicle.
-- Fasten the seat belt.
-- Move the selector lever into "P".
-- Press the brake pedal.
-- Push the accelerator pedal up to >>kick-down<<.
The internal combustion engine is now active.
-- Open the hood again.
-- Follow the instructions on the Emissions Testing Station.