General Precautions of EFI System Maintenance
F-109
10. Normal start with high idling speed.
General malfunction Locations: 1. Throttle Body; 2. Vacuum Pipe; 3. Coolant Temperature Sensor; 4. Ignition
Timing.
General Diagnostic Flow:
S/N Operating Steps Test Result Follow-up Step
1
Inspect whether or not the throttle cable is jammed or too
tight.
Inspect whether or not the swing arm of throttle is jammed or
too tight.
Yes Adjustment
No Next Step
2
Inspect whether or not air leakage exists with the intake
system and the connected vacuum pipeline.
Yes
Air intake
system to be
inspected and
repaired
No Next Step
3
Inspect whether or not carbon accumulation exists on the
throttle body.
Yes
Related parts
and
components to
be cleaned
No Next Step
4
Pull off the joint of coolant temperature sensor, start the
engine, and observe whether or not the idling speed of engine
is too high at this point.
Yes
Line to be
inspected and
repaired or
sensor to be
replaced
No Next Step
5
Inspect whether or not the ignition timing of engine is
compliant with the specification.
Yes Next Step
No
Ignition timing
to be inspected
and repaired
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#, 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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