Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Celica 1988-1989.1993-1994.2000 Approved Toyota Celica 1993 BASIC_TE

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BASIC_TE


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                                                           F - BASIC TESTING - 4-CYL

                                                                     1993 Toyota Celica




                1993 ENGINE PERFORMANCE
                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 the 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.

4-CYLINDER COMPRESSION SPECIFICATIONS



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