Engine Code AHU

Special Tools, Testers And Auxiliary Items:
- US8026 Hand vacuum pump

Test Sequence:
- Remove connecting pipe between intake pipe and charge air cooler.
- Disconnect vacuum hose from EGR valve (in intake manifold).
- Connect US8O26 hand vacuum pump to EGR valve.





- Operate vacuum pump.
The valve plate must lift from valve seat (observe membrane cam via intake opening).
- Disconnect US8026 hand vacuum pump from EGR valve.
Valve must audibly close (valve plate must position itself again on valve seat)