The EGR is tested durning decel(900-1700RPM) with lamda operational. The MAP sensor monitors slight changes(54mbar+) in manifold vacuum.

Air injection is monitored when:
engine is at idle
vehicle isn't moving
air pump activated 1 time after starting(cold engine)
no faults in EGR system
no electrical faults in air injection system
no faults with throttle actuator
no combustion misfires detected
no fault with front O2 sensor(s)
no CAN data bus errors
self adaptation NOT at limit
outside air pressure above 780hPa
Engine temp less than 90C
Lamda operational
!!!!! A/C is OFF !!!!

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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