3-1
Vehicle Testing
This chapter contains information necessary to:
•
Prepare a vehicle for testing,
•
Perform tests, and
•
Evaluate test data.
Preliminary Checks
Conduct a thorough inspection of the vehicle before performing
any analysis or troubleshooting with the analyzer. Accurate engine
performance diagnosis depends on proper operation of related
components or systems. Perform the following inspection,
repairing and replacing items as required. Careful visual checks
may lead to correcting a problem. Examine all the following
systems and components:
Fluid Levels
•
Engine oil
•
Transmission fluid
•
Coolant
Filters
•
Air cleaner
•
Fuel filter
•
Crankcase breather
•
Charcoal canister filter
•
Air injection pump filter
Hoses—Connections, Cracks, Leaks, etc.
•
Vacuum hoses for splits, kinks, proper connections and routing
— Check thoroughly for any leak or restriction.
•
Fuel system hoses
•
Cooling system hoses
Belt—Cracks, Tension, Glazing, etc.
•
Alternator
•
Air conditioning
•
Power steering pump
•
Air injection pump
•
Fan
3
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