Chery automobile Service Manual page 473

(2)
diode-testing
high-pressure switch and
increase the engine speed
slowly.
pressure
160-200KPa,
light-emitting diode should
be lighted. If it is not
lighted, then it indicates
that the high pressure
switch is faulty; further
increase the engine speed
up to 2000r/min, then the
oil pressure should reach at
least 200KPa. Otherwise it
indicates
lubricating
faulty.
Upon the above inspection,
if the lubricating system
and lubricating oil pressure
switch are both normal,
but the
keeps on indicating that
the malfunction is still
present, and it should
inspect
malfunction according to
the circuit diagram.
Pay attention
carrying
inspection:
pressure warning switch
circuit, the warning lamp
will be lighted when there
is a short circuit to ground,
so it should emphasize on
inspecting to see whether
there is any grounding;
while for high pressure
warning switch circuit, the
warning
lighted when there is an
open circuit as well as
when the engine speed is
over 2000r/min,
should
inspecting to see whether
there is any open circuit.
T-33
Connect the
light to
When the oil
reaches
the
that the
system is
warning lamp
the circuit
when
out the
for low
lamp will be
so it
emphasize on