CHANGHE FREEDOM SERVICE MANUAL GENERAL INFORMATION
PRECAUTIONS FOR CATALYTIC CONVERTER
Be must to use unleaded gasoline and be careful not
to let a large amount of unburned gasoline enter the
converter or it can be damaged。
z Conduct a spark jump test only when necessary.
z Conduct engine compression checks within the
shortest possible time。
z Avoid situations which can result in engine misfire
(e.g. starting the engine when the fuel tank is nearly
empty.)
PRECAUTIONS FOR ELECTRICAL CIRCUIT
SERVICE
z When disconnecting and connecting coupler, make
sure to turn ignition switch OFF, or electronic parts may
get damaged.
z Be careful not to touch the electrical terminals of
parts which use microcomputers（e.g. electronic control
unit like as ECM,PCM,P/S controllers, etc），The static
electricity from your body can damage these parts.
zNever connect any tester(voltmeter, ohmmeter, or
whatever)to electronic control unit when its coupler is
disconnected. Attempt to do it may cause damage to it.
z Never connect an ohmmeter to electronic control
unit with its coupler connected to it. Attempt to do it may
cause damage to electronic control unit and sensors.
z Be sure to use a specified voltmeter/ohmmeter.
Otherwise, accurate measurements may not be obtained
or personal injury may result.
z When taking measurements at electrical
connectors using at tester probe, be sure to insert the
probe from the wire harness side(backside) of the
connector.
z When connecting meter probe from terminal side
of coupler because it can’t be connected from harness
side, use extra care not to bend male terminal of coupler
of force its female terminal open for connection。In case
of such coupler as shown connect probe as shown to
avoid opening female terminal. Never connect probe
where male terminal is supposed to fit.
z When checking connection of terminals, check its
male half for bend and female half for excessive opening
and bother locking(looseness), corrosion, dust, etc.
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