Condition for fault identification

Temperature precondition:

• Catalytic converter temperature greater than 500 °C.

Time precondition:

• Constant exhaust mass flow greater than 50 kg/h.

Other preconditions:

• Constant-speed driving between 50 km/h and 80 km/h during medium

engine speed (1200 RPM to 3000 RPM).

• No fault code entries that could cause a fault in the fuel-air mixture.

Control unit voltage: 9 V to 16 V.

Terminal 15 on