1991 Toyota MR2 E – THEORY/OPERATION

1991 Toyota MR2. Computers For Electronics & El Camino Real Santa Clara, CA …. DIAGRAMS article in the chapter on engine performance. ….

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1991 Toyota MR2 E – THEORY/OPERATION

1991 ENGINE PERFORMANCE
Toyota Theory & Operation for Camry, Celica, Corolla, Cressida, Land Cruiser, MR2, Pickup, Previa, Supra, Tercel, 4Runner

  • COMPUTERIZED ENGINE CONTROLS
  • TOYOTA COMPUTER CONTROL SYSTEM (TCCS)
  • CONTROL UNIT
  • ECU LOCATIONS TABLE
  • CIRCUIT OPENING RELAY
  • A/C SWITCH
  • AIRFLOW SENSOR
  • AIR TEMPERATURE SENSOR
  • BATTERY SIGNAL
  • BRAKE LIGHT SIGNAL
  • COOLANT TEMPERATURE SENSOR (CTS)
  • COOLANT TEMPERATURE SWITCH (LAND CRUISER)
  • CRANKING SIGNAL
  • EGR GAS TEMPERATURE SENSOR (CALIF.)
  • KNOCK SENSOR
  • NEUTRAL/START SWITCH
  • OIL PRESSURE SWITCH SIGNAL (SUPRA TURBO)
  • OXYGEN (O2) SENSOR (ZIRCONIA TYPE – CALIF.)
  • OXYGEN (O2) SENSOR (TITANIA TYPE – FEDERAL)
  • RPM SIGNAL
  • SUB-OXYGEN SENSOR (CALIF.)
  • THROTTLE POSITION SENSOR (TPS)
  • TURBO PRESSURE SENSOR (CELICA TURBO)
  • VACUUM SENSOR (CELICA NON-TURBO, COROLLA 4A-FE, MR2 5S-FE & TERCEL)
  • VEHICLE SPEED SENSOR (VSS)
  • 4WD SWITCH (LAND CRUISER, PICKUP & 4RUNNER)

The ECU receives input from data sensors and, depending on model application, controls the following components and subsystems:

  • A/C CUT CONTROL SYSTEM
  • See IDLE SPEED.
  • AIR INJECTION SOLENOID
  • AIR SUCTION CONTROL SOLENOID, See EMISSION SYSTEMS.
  • CIRCUIT OPENING RELAY, See FUEL DELIVERY.
  • DASHPOT SYSTEM, See DASHPOT SYSTEM.
  • ELECTRONIC FUEL INJECTION, See FUEL CONTROL.
  • ELECTRONIC SPARK ADVANCE, See IGNITION SYSTEM.
  • EGR CONTROL SOLENOID, See EMISSION SYSTEMS.
  • ELECTRONIC CONTROLLED TRANSMISSION (ECT), See MISCELLANEOUS CONTROLS.
  • FUEL PRESSURE VACUUM SWITCHING VALVE, See FUEL DELIVERY.
  • FUEL PUMP, See FUEL DELIVERY.
  • IDLE SPEED CONTROL
  • IDLE-UP SYSTEM
  • INTAKE AIR CONTROL SYSTEM
  • O2 SENSOR HEATER, See FUEL CONTROL.
  • SELF-DIAGNOSTIC SYSTEM
  • TURBOCHARGER VACUUM SWITCHING VALVE (VSV), See AIR INDUCTION SYSTEM.
  • VARIABLE INDUCTION VACUUM SWITCHING VALVE (VSV), See AIR INDUCTION SYSTEM.

 

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