Preparation For Testing; Before You Begin - Innova 3100 Owner's Manual

Preparation for Testing

BEFORE YOU BEGIN

BEFORE YOU BEGIN
OBD 2 Code Reader aids in
monitoring electronic- and
emissions-related faults in
your vehicle and retrieving
fault codes related
malfunctions in these systems.
Mechanical problems such as
low oil level or damaged hoses, wiring or electrical connectors can
cause poor engine performance and may also cause a "false" fault
code. Fix any known mechanical problems before performing any test.
See your vehicle's service manual or a mechanic for more information.
Check the following areas before starting any test:
Check the engine oil, power steering fluid, transmission fluid (if
applicable), engine coolant and other fluids for proper levels.
Top off low fluid levels if needed.
Make sure the air filter is clean and in good condition. Make sure
all air filter ducts are properly connected. Check the air filter ducts
for holes, rips or cracks.
Make sure all engine belts are in good condition. Check for
cracked, torn, brittle, loose or missing belts.
Make sure mechanical linkages to engine sensors (throttle,
gearshift position, transmission, etc.) are secure and properly
connected. See your vehicle's service manual for locations.
Check all rubber hoses (radiator) and steel hoses (vacuum/fuel)
for leaks, cracks, blockage or other damage. Make sure all hoses
are routed and connected properly.
Make sure all spark plugs are clean and in good condition. Check
for damaged, loose, disconnected or missing spark plug wires.
Make sure the battery terminals are clean and tight. Check for
corrosion or broken connections. Check for proper battery and
charging system voltages.
Check all electrical wiring and harnesses for proper connection.
Make sure wire insulation is in good condition, and there are no
bare wires.
Make sure the engine is mechanically sound. If needed, perform a
compression check, engine vacuum check, timing check (if
applicable), etc.
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