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1-14
CONTROL SYSTEM
The control system used is basically the same as that in
the conventional 6G72 engine in the SIGMA. However,
Main items changed or added
Control relay and fuel pump power circuit have
been changed.
Crank angle sensor mounting position has been
changed. (Crank angle previously detected from
the camshaft is now detected directly from the
crankshaft.)
Adoption of fuel pump relay No.2 and fuel pump
resistor
Fuel pressure control has been added.
(Refer to P.1-26.)
Turbo pressure control has been added.
Turbo meter control has been added.
Adoption of a twin oxygen sensor system
<Vehicles for Europe, Hong Kong and Singapore>
ENGINE - Control System
some parts differ as shown below.
Notes
·
Simplified power circuit
·
Basically the same as the 4G9-DOHC engine
·
Improvement in crank angle sensor precision
Improvement in ignition timing control precision
Improvement in fuel pump reliability
Control additions to correspond to adoption of a turbocharger
Reduction in exhaust gas levels
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