Test condition:
Engine running.
No faults stored.
No leaks in the exhaust system.
All electrical loads switched off.
Note:
Used to check the positioning of the lambda probes.
Procedure:
Choose the function: Lambda probe positioning test.
Press and hold down the brake pedal.
Press the throttle pedal fully down.
The engine control unit increases the engine speed to about 1800 rpm.
The diagnostic status field will change from ”Test off” to ”Test on”.
The temperature of the catalytic converter must be above 350°C.
Maintain the engine speed until the diagnostic status field changes from ”Test on” to ”Syst. OK!/ Syst. not OK!”.
If ”Syst. not OK!” appears, check that the correct lambda probe is screwed into the correct exhaust pipe (lambda probe bank 1 in the right-hand exhaust pipe and lambda probe bank 2 in the left-hand exhaust pipe).