Preconditions for the test:
Engine running.
No faults stored.
Engine temperature above 85 °C.
No leaks in the exhaust system.
All electrical loads switched off.
Gear selector set to P/N.
Note:
Used to test the lambda regulation.
During basic setting, the AC compressor is switched off and the carbon canister valve is closed.
Procedure:
Choose the function: Lambda regulation, probe after catalytic converter.
Maintain the engine speed at 2600 rpm.
Diagnostic status changes from ”Test off” to ”Test on”.
Read the lambda probe 2, bank 1. Prescribed value: 0.1 till 0.95 V.
Read the lambda compensation value B1-S1/B1-S2. Prescribed value: under 0.02.
Diagnostic status must change from ”Test on” to ”System OK/ System not OK”.
On completion of basic setting, the AC compressor and carbon canister valve are activated automatically.