gio Vyper 4WD 1100cc 4 seater XY1100UEL, Service Manual

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11. EFI SYSTEM OF SQR 472ENGINE
11-76
1. Solar term door body and idle bypass airway;
2. The vacuum tube;
3. Idle speed regulator;
4. The coolant temperature sensor;
5. The ignition timing.
The general procedure of diagnosis:
Serial
number
Operation steps Test
results Next step
Yes Adjustment 1 Check the throttle cable is stuck or
too tight
No Next step
Yes Maintenance of air intake system 2 Check the intake system and
vacuum pipe connection whether
there is leakage
No Next step
Yes Cleaning of parts 3 Remove the idle adjuster, solar term
door body check, idle speed
regulator and idle speed was the
existence of the phenomenon of
carbon deposition in the airway
No Next step
Yes Repair or replace the sensor line 4 Pulling off the coolant temperature
sensor connector, start the engine,
when the engine is idling too high
observation
No Next step
Yes Next step
5
Check the engine ignition timing
meets the specifications
No Maintenance of the ignition timing
Yes Diagnostic aid
6
Check the X1_1# X1_2# pin on the
iron is normal
No Maintenance of the corresponding line