Air Pump Switchover Valve, Task

Air Pump Switchover Valve, Task

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

When actuated, the air pump switchover valve switches the vacuum from the intake manifold through to the air shutoff valve. This valve opens and the air supplied by the air pump is forced into the exhaust manifold.