General Instructions - KYMCO AHG5 Service Manual

13. Fi DIAGNOSTIC TOOL

5.2. General Instructions


Scooter services can be done with the engine installed in the frame.
 Be sure to relieve the fuel pressure before fuel pump or fuel hose removal.
 Bending or twisting the control cables will affect operation and could cause the cables to stick or
bind, resulting in loss of vehicle control.

Work in a fully ventilated area. Smoking or allowing flames or sparks in the work area or where
gasoline is stored can cause a fire or explosion.

Do not apply the Carburetor Cleaners to the inside of the throttle body, which is coated with
molybdenum.

Do not snap the throttle valve from fully open to fully close after the throttle cable has been
removed; it may cause incorrect idle speed.
 Do not loosen or tighten the painted bolts and screws of the throttle body. Loosening or tighten
them can cause throttle and idle valve synchronization failure.

Seal the cylinder head intake ports with tape or a clean towel to prevent dirt and debris from
entering the intake ports after the throttle body has been removed.

Do not damage the throttle body. It may cause incorrect throttle and idle valve synchronization.

Do not take the fuel pump on the ground downward.
 Always replace the packing when the fuel pump is removed.

The electronic fuel injection system is equipped with the self-diagnostic system. If the Check
Engine Lamp "CELP" illuminate while riding, follow the self-diagnostic procedures to solve
the problem.

A faulty AFI problem is often related to poorly connected or corroded connectors. Check those
connections before proceeding.

When disassembling the fuel injection parts, note the location of the O-rings. Replace them with
new ones upon reassembly.
 Do not disconnect the battery negative (-) or positive (+) cable while engine is running, it may
cause ECU damage.
Do not disconnect or connect the ECU connector during the ignition switch "ON"; it may

cause the ECU damage.
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DT X360