It Is Hard To Start The Heating Car - Chery A21 2005 Service Manual

CHERY·A21 SERVICE MANUAL

3. It is hard to start the heating car.

General failure component: 1) water inside of fuel; 2) fuel pump; 3) coolant
temperature sensor; 4) fuel pressure regulator vacuum pipe; 5) ignition coil.
General diagnostic flow
No.
Connect the fuel pressure meter ( connecting point is the
pipe); starting the engine and check fuel pressure at idle
1
from fuel pressure regulator check the fuel pressure if it
2
3
4
5
Connect EFI system adaptor, turn on the ignition switch;
6
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Operating steps
front end of fuel distributing pipe assembly fuel intake
speed if it is around 260kpa; take off the vacuum pipe
is around 300kpa.
Pull off one of the cylinder separating line and connect
spark plug to it; keep the spark electrode around 5mm
away from engine body; start the engine and check if
there is blue and white high pressure fire.
Take off the coolant temperature sensor joint and start
the engine; observe if the engine can be started
successfully. (or serial connecting a 300Ωresistance at
the joint of coolant temperature sensor; observe if we
can start the engine)
Check if there if loosen or leaking of the fuel pressure
regulator vacuum pipe..
Check fuel conditions and check if the failure is
appeared after the fuel refilling
check the power supply of pin No.12, 13, 44, 45 and
No.63 if it is in right conditions; check pin armature of
No.3, 51, 53, 61 and No.80 if it is in right conditions.
55
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ENGINE EFI SYSTEM
Follow up
Result
steps
Yes Next step
Repair the
No fuel supplying
system
Yes Next step
Repair the
No ignition
system
Repair circuit
Yes or replace
sensor
No Next step
Repair or
Yes
replace
No Next step
Yes Change fuel
Diagnosis
No
help
Diagnosis
Yes
help
Check
correspond
circuit