Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Celica 1988-1989.1993-1994.2000 Approved Toyota Celica 1994 E theory operation

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.



Image preview - the first page of the document
E theory operation


>> Download E theory operation documenatation <<

Text preview - extract from the document
                                 E - THEORY/OPERATION

                                      1994 Toyota Celica




         1994 ENGINE PERFORMANCE
         Toyota Theory & Operation

         Celica

    INTRODUCTION
          This article covers basic description and operation of engine
performance-related systems and components. Read this article before
diagnosing vehicles or systems with which you are not completely
familiar.

    COMPUTERIZED ENGINE CONTROLS

    TOYOTA COMPUTER CONTROL SYSTEM (TCCS)
         The TCCS is a computerized emission, ignition and fuel
injection control system. The TCCS lowers exhaust emissions while
maintaining good fuel economy and driveability. System consists of
various sensors, switches and control units. See Figs. 1 and 2.
         An Engine Control Module (ECM) controls the TCCS based on
input signals received from various input devices. The ECM contains
preprogrammed data to maintain optimum engine performance under all
operating conditions.




Fig. 1: Locating TCCS Components (1.8L)
Courtesy of Toyota Motor Sales, U.S.A., Inc.
Fig. 2: Locating TCCS Components (2.2L)
Courtesy of Toyota Motor Sales, U.S.A., Inc.

    ENGINE CONTROL MODULE
          The Engine Control Module (ECM) microcomputer receives input
signals from various sensors, switches, and ignition and starting
system components. The ECM uses this information for controlling
various functions. See OUTPUT SIGNALS under COMPUTERIZED ENGINE
CONTROLS.
          The ECM has constant battery voltage at BATT terminal. The
ECM contains a fail-safe function, used in case of sensor or switch
failure. Fail-safe function uses preprogrammed values to provide a
limp-in mode for minimal driveability. If a failure exists, ECM will
inform the driver by turning on Malfunction Indicator Light (MIL) on
the instrument panel.

NOTE:    The MIL light may also be referred to as the CHECK ENGINE
         light.
         The ECM is equipped with a self-diagnostic function.
Diagnostic trouble codes may be set by the malfunction of various
engine sensors, switches or circuits, and stored in the ECM memory.
When certain diagnostic trouble code is stored, Malfunction Indicator
Light (MIL) on instrument panel may come on.

ECM LOCATION TABLE



◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo