Modification notes
The operation descriptions and operation numbers have been matched with the "operation texts and work units" or "standard texts and flat rates".
Always refer to the microfilm "operation texts and work units" or "standard texts and flat rates" for the operation numbers for the repair order.
Refer to the valid repair microfilm for the repair procedure.
1. General
Examination and approval of the exhaust characteristics of vehicles used on public roads (emissions test) is defined in paragraph 47 a and 47 b as well as in Annex VIII a of the (German) Road Traffic Registration Ordinance (StVZO).
In the Federal Republic of Germany an inspection of exhaust emissions has been mandatory since 01.04.1985.The vehicles which are subject to this exhaust emissions test are summarized in the overview of the test procedure.
The test and setting data for vehicles not fitted with TWC as well as open-loop TWC are listed in the microfilm Emissions Test I.
Vehicles with a closed-loop TWC or with a diesel engine which are subject to Emissions Test II, are dealt with in a subsequent microfilm.
2. Survey of test methods
Vehicle type | Production breakpoint | Scope of test | Time interval of tests |
1. Spark ignition engine without TWC (gasoline) | already mandatory (ASUI, 01.04.1985) | Visual inspection of pollutant-relevant components Inspection of pollutant-relevant setting data Carbon monoxide measurement (max. 3.5 % CO) | 12 months |
2. Spark ignition engine with open-loop TWC (gasoline) | 01.12.92 | Visual inspection of pollutant-relevant components including constricted fuel filler neck Inspection of pollutant-relevant setting data including proper operation of exhaust gas recirculation system/ secondary air system (max. 3.5 % CO) | 12 months |
01.01.94 | Efficiency of catalytic converter by means of measurement of CO content at fast idle speed | ||
3. Spark ignition engine with closed-loop TWC (gasoline) | 01.12.93 | Visual inspection of pollutant-relevant components including constricted fuel filler neck Inspection of pollutant-relevant setting data Operational test of lambda control loop and evaluation of TWC on the basis of lead component of carbon monoxide (CO content max. at idle speed 0.5 %, at fast idle speed 0.3 %) | a) Cars for first time 36 months after first registration. Further tests every 24 months b) Vehicles for the conveyance of passengers every 12 months c) All other vehicles not listed under a) or b) every 24 months |
4. Compression ignition engine (diesel) | 01.12.93 | Visual inspection of pollutant-relevant components including inspection of | to 3,500 kg permissible gross weight a) Cars for first time 36 months after first registration. Further tests every 24 months b) Vehicles for the conveyance of passengers every 12 months c) All other vehicles not listed under a) or b) every 24 months more than 3,500 kg permissible gross weight every 12 months |
The following are exempted:
1. Motor vehicles with
a) Spark ignition engine (gasoline), which have fewer than four wheels, a permissible gross weight of less than 400 kg or a design-related maximum speed of less than
50 km/h, or which were first registered prior to 1st July 1969.
b) Compression ignition engine (diesel), which have less than four wheels or a design-related maximum speed of not more than 25 km/h, or which were first registered prior to
1st January 1977.
c) red license plate (§ 28 StVZO).
2. Agricultural or forestry tractors.
3. Self-propelled machines not integrated in the maintenance service.
3. Notes on maintenance
The inspection items of the emissions test in the case of vehicles fitted with closed-loop catalytic converter and in the case of diesel engines are not contained in the previous maintenance service. For this reason, the emissions test is not integrated in the maintenance service.
Vehicles not fitted with a catalytic converter or with an open-loop catalytic converter, which were previously subject to the annual inspection interval, shall continue to be tested as part of the maintenance service.
4. Inspection and setting data
This microfilm contains the inspection and setting data of vehicles not fitted with TWC and with closed-loop TWC.
The work involved in locating a specific model is simplified by the model listing at the beginning.