Equus 3040 - OBD2 ScanTool - Manual (Page 26)

Preparation for Testing
BEFORE YOU BEGIN - VEHICLE SERVICE MANUALS
24 OBD2
BEFORE YOU BEGIN
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 com-
pression check, engine vacuum check, timing check (if applicable), etc.
VEHICLE SERVICE MANUALS
Always refer to the manufacturer's service manual for your vehicle
before performing any test or repair procedures. Contact your local car
dealership, auto parts store or bookstore for availability of these
manuals. The following companies publish valuable repair manuals:
„ Haynes Publications - 861 Lawrence Drive, Newbury Park, CA
91320 Phone: 800-442-9637 Web: www.haynes.com
„ Mitchell 1 - 14145 Danielson Street, Poway, CA 92064 Phone:
888-724-6742 Web: www.m1products.com
„ Motor Publications - 5600 Crooks Road, Suite 200 , Troy, MI
48098 Phone: 800-426-6867 Web: www.motor.com
FACTORY SOURCES
Ford, GM, Chrysler, Honda, Isuzu, Hyundai and Subaru Service Manuals
„ Helm Inc. - 14310 Hamilton Avenue, Highland Park, MI 48203
Phone: 800-782-4356 Web: www.helminc.com