Maintenance Manual for J2 Sedan
Electronic Control System
230
Trouble phenomenon 4: Difficulty in cold start
General trouble position:
sensor;
5.Ignition coil; 6.Air throttle body and idle bypass air passage; 7.Mechanical part of engine
General diagnosis procedure:
Next step
1
Connect the fuel pressure gauge (the access point is
front end of the induction manifold of the f
pipe assembly) to the engine and start
whether the reading of fuel pressure gauge at
is at about 260kPa. Disconnect vacuum hose on pressure
regulator and observe whether fuel pressure is
Next
2
Pull out the high-voltage wire
of one of the cylinders and
connect the spark plug to make the s
about 5mm away from the engine body, and start the engine
to check whether there is the blue and white high-voltage
Pull out the connector of
coolant temperature sensor and
start the engine to observe whether the engine is successfully
Alternatively, connect a 2500 ohm
resistance in series at the
connector of coolant temperature
sensor to observe whether the engine is
Wash the air throttle
4
Gently step down the accelerator pedal to observe whether it
Next step
Dismantle the fuel injector and check whether
leakage or blockage in the fuel injector with the
analyzer special for fuel injector.
Check the fuel conditions and observe whether the trouble
phenomenon occurs just after adding the fuel.
mechanical trouble of
7
Check the pressure states of all
the cylinders of engine and
observe whether the pressure of engine cylinder is
Next step
Turn on the ignition switch and
supply and earthing are normal.
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