Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Celica 1988-1989.1993-1994.2000 Approved Toyota Celica 1989 egr function testing

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                                                             EGR FUNCTION TESTING

                                                                      1988 Toyota Celica




                1988 EXHAUST EMISSION SYSTEMS
                TOYOTA EGR FUNCTION TESTING

        TESTING

        EGR TEST
         1) Ensure modulator filter is clean and in good condition
prior to performing test. Clean filter with compressed air if
necessary. Disconnect vacuum hose from EGR valve.
         2) Using a "T" connector, connect a vacuum gauge in EGR valve
line. Check that engine starts and runs at idle. This ensures proper
seating of EGR valve.
         3) The BVSV, TVSV, VSV and EGR modulator can be checked with
engine coolant below minimum temperature and specified engine RPM in
accordance with application. See EGR SPECIFICATIONS table.
Different valves are used depending on model. See Figs. 1 through 16.
         4) Operate engine with engine coolant below minimum
temperature and specified RPM. No vacuum reading should be obtained
when operated with engine coolant below minimum temperature.
         5) Operate engine at normal operating temperature and
specified RPM. See EGR SPECIFICATIONS table for specified engine RPM.
Low vacuum reading should be obtained.
         6) Vacuum reading of 2.6 in. Hg should be obtained on
Cressida and Supra models. On Cressida, Land Cruiser, Pickup and
4Runner (3.0L) and Supra non-turbo models, check that no vacuum is
shown at idle. Also check Corolla models with EFI, Corolla FX-16 and
the MR2 models at 5000 RPM. No vacuum should exist.
         7) Disconnect hose from the "R" port of EGR vacuum modulator
on all models except the Celica 4WD, Tercel Wagon, Pickup (turbo) and
Supra (turbo) models. See Figs. 1 through 16.
         8) Using additional hose, connect "R" port directly to intake
manifold. High vacuum reading should be obtained at specified engine
RPM. See EGR SPECIFICATIONS table.

NOTE:           Engine should misfire due to large amounts of exhaust gas
                being injected into intake manifold.

         9) Disconnect vacuum gauge and install vacuum hoses. To check
EGR valve, apply vacuum directly to EGR valve with engine idling.
Engine should run rough. If system did not operate within
specifications, each component should be tested. See COMPONENT TEST in
this article.

EGR SPECIFICATIONS TABLE
 

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