Test condition:
Engine running
No faults stored
No leaks in the exhaust system
All electrical loads switched off
Coolant temperature at least 80 °C
The temperature of the catalytic converter at least 400 °C
Note:
Used to test the lambda probe before the catalytic converter.
Procedure:
Start the function.
Depress brake pedal
The engine speed will raise by the engine control module to 1100-1400 rpm
Test may take several minutes
The status field will change from "Test off" to "Test on"
Maintain the engine speed until the status field changes from "Test on" to "B1-S1 OK/B1-S1 not OK"
If the specifications are not attained, interrogate fault memory.
Exit function.