Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
229
Trouble phenomenon 3: Difficulty in warm start
General trouble position:
1. Poor quality of fuel; 2.Fuel injection pump; 3.Coolant temperature sensor; 4.Ignition coil
General diagnosis procedure:
No.
Operating Steps
Detection
Results
Subsequent Steps
Yes
Next step
1
Connect the fuel pressure gauge (the access point is at the front end
of the induction manifold of the fuel distribution pipe assembly) to
the engine and start the engine to check whether the reading of fuel
pressure gauge at idle condition is at about 260kPa. Disconnect
vacuum hose on pressure regulator and observe whether fuel
pressure is about 300kPa.
No
Repair fuel supply
system
Yes
Next step
2
Pull out the high-voltage wire of one of the cylinders and connect
the spark plug to make the spark plug electrodes about 5mm away
from the engine body, and start the engine to check whether there is
the blue and white high-voltage spark.
No
Repair ignition system
Yes
Repair circuit or
replace the sensor
3
Pull out connector of coolant temperature sensor and start the
engine to observe whether the engine is successfully started at this
time. (Alternatively, connect a 300 ohm resistance in series at the
connector of coolant temperature sensor to observe whether the
engine is successfully started at this time.)
No
Next step
Yes
Repair or replace
4
Check the vacuum pipe of fuel pressure regulator for the shedding
or air leakage.
No
Next step
Yes
Change fuel
5
Check fuel conditions and observe whether the trouble phenomenon
occurs just after adding fuel.
No
Next step
Yes
Diagnosis help
6
Turn on the ignition switch and check whether the power supply
and earthing are normal.
No
Repair related circuit
