Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Celica 1988-1989.1993-1994.2000 Approved Toyota Celica 1994 F basic testing

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                                                                   F - BASIC TESTING

                                                                       1994 Toyota Celica




                1994 ENGINE PERFORMANCE
                Toyota 4-Cylinder Basic Diagnostic Procedures

                Celica

        INTRODUCTION
         The following diagnostic steps will help prevent overlooking
a simple problem. This is also where to begin diagnosis for a no-start
condition.
         The first step in diagnosing any driveability problem is
verifying the customer's complaint with a test drive under the
conditions problem reportedly occurred.
         Before entering self-diagnostics, perform a careful and
complete visual inspection. Most engine control problems result from
mechanical breakdowns, poor electrical connections or
damaged/misrouted vacuum hoses. Before condemning the computerized
system, perform each test listed in this article.

NOTE:           Perform all voltage tests with a Digital Volt-Ohmmeter
                (DVOM) with a minimum 10-megohm input impedance, unless
                stated otherwise in test procedure.

        PRELIMINARY INSPECTION & ADJUSTMENTS

        VISUAL INSPECTION
         Visually inspect all electrical wiring, looking for chafed,
stretched, cut or pinched wiring. Ensure electrical connectors fit
tightly and are not corroded. Ensure vacuum hoses are properly routed
and are not pinched or cut. See M - VACUUM DIAGRAMS article to verify
routing and connections (if necessary). Inspect air induction system
for possible vacuum leaks.

        MECHANICAL INSPECTION
         Compression
         Check engine mechanical condition with a compression gauge,
vacuum gauge, or engine analyzer. See engine analyzer manual for
specific instructions.

WARNING: DO NOT use ignition switch during compression tests. Use a
         remote starter to crank engine. Fuel injectors on many models
         are triggered by ignition switch during cranking mode, which
         can create a fire hazard or contaminate the engine's oiling
         system.

COMPRESSION SPECIFICATIONS TABLE
 

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