General Precautions of EFI System Maintenance
F-102
3. Difficult warming-up start of engine.
General malfunction Locations: 1. Water-containing Fuel 2. Fuel Pump; 3. Coolant Temperature Sensor; 4.
Vacuum Pipe of Fuel Pressure Regulator; 5. Ignition Coil.
General Diagnostic Flow:
S/N Operating Steps Test Result Follow-up Step
1
Link up the fuel pressure gauge (the linking point to be on the
front end of the oil inlet pipe for the fuel rail assembly), start
the engine, and examine whether or not the fuel pressure is at
about 400kPa under the idling speed operating condition.
Remove vacuum tube on fuel pressure regulator, verify
whether pressure is about 450kpa.
Yes Next Step
No
Fuel system to
be inspected
and repaired
2
Pull out the cylinder connection from one of the cylinders, link
up the spark plug, cause the sparking-plug electrode to be
about 5mm away from the engine body, start the engine, and
examine whether or not there is blue and white high voltage
flame.
Yes Next Step
No
Ignition system
to be inspected
and repaired
3
Pull off the joint of coolant temperature sensor, start the
engine, and observe whether or not engine is successfully
started at this point. (or connect up a 300 ohm electric
resistance in series at the joint of the coolant temperature
sensor to replace the coolant temperature sensor, and observe
whether or not engine is successfully started at this point.)
Yes
Line to be
inspected and
repaired or
sensor to be
replaced
No Next Step
4
Inspect whether or not loosening or air leaking effect exists
with the vacuum pipe of fuel pressure regulator.
Yes
To be inspected
and repaired or
replaced
No Next Step
5
Inspect the fuel status, and observe whether or not malfunction
symptom is caused just after fuel has been filled.
Yes
Fuel to be
replaced
No Next Step
6
Link up the adapter of the electronic injection system, turn on
the ignition switch, and examine whether or not the power
supply for Pins 12#, 63#, 35#, 44# and 45# is normal. Inspect
whether or not the grounding of Pins 79#, 17#, 35#, 36#, 51#,
53#, 80# and 61# is normal.
Yes
Diagnostic
Help
No
Corresponding
lines to be
inspected and
repaired
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