Air Pump Switchover Valve, Design/Function

Air Pump Switchover Valve, Design/Function

ENGINE 104.941 /942 /943 /944 /991 /994 as of 1.8.96
ENGINE 104.995
with CODE (494a) USA version
with CODE (807) Model year 1997
with CODE (808) Model year 1998
with CODE (498) as of Model Year 97 Japanese version
ENGINE 111.961 with CODE (494a) USA version
ENGINE 111.974
with CODE (494a) USA version
with CODE (807) Model year 1997
with CODE (808) Model year 1998
ENGINE 111.973 /975
with CODE (494a) USA version
with CODE (923a) low emission D3
ENGINE 119.980 /981 /982 /985
with CODE (494a) USA version
with CODE (923a) low emission D3
with CODE (920a) with exhaust air pump (secondary air injection)
(TAW) (ROK) as of 12/96
ENGINE 120.982 /983
ENGINE 104.941 /942 /991 /992 /994 with CODE (494a) USA version




1 Air admission
2 From intake manifold
3 To air shutoff valve
A Deenergized
B Actuated

Air pump switchover valve is actuated by the engine control module through its own output stage simultaneously to the air pump by means of a GND signal.
Voltage is supplied through the overvoltage protection relay (model 124, 202 up to 7/96), base module (model 129, 140), relay module (model 170, 210 up to 2/97) or the fuse and relay module (model 202 as of 8/96, model 210 as of 3/97, model 163 designation F1).