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Home >> Toyota >> 1994 >> MR2 2.0 S >> Repair and Diagnosis >> Engine Performance >> Sensor Range Charts >> Engine Controls - Sensor Operating Range Charts >> Sensor Operating Specifications >> Manifold Absolute Pressure (Map) Sensor
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Manifold Absolute Pressure (Map) Sensor

NOTE: MAP sensor may also be identified using appropriate illustration in THEORY/OPERATION article. The MAP sensor has a vacuum hose connected to it and may be identified by wire colors. See appropriate wiring diagram in the WIRING DIAGRAMS article.
MAP SENSOR LOCATIONS

Application Location
MR2 Passenger's Side Of Engine Bay, Near Strut Tower
  1. The MAP sensor may also be referred to as a vacuum sensor. Ensure ignition is off. To check MAP sensor supply voltage, disconnect electrical connector from MAP sensor. See MAP SENSOR LOCATIONS  table.
  2. Turn ignition on. Using voltmeter, measure voltage between terminals VC or VCC and E2 of electrical connector on wiring harness. The VC or VCC and E2 terminals are the 2 outer terminals on all models. Voltage should be within specification. See the MAP SENSOR SUPPLY VOLTAGE SPECIFICATIONS  table.
  3. If supply voltage is not within specification, check wiring circuit. See appropriate wiring diagram in WIRING DIAGRAMS article. If supply voltage is correct, turn ignition off. Reinstall electrical connector on MAP sensor.
  4. To check MAP sensor output voltage, turn ignition on. Disconnect MAP sensor vacuum hose from intake manifold. Connect voltmeter to terminals PIM and E2 of Engine Control Module (ECM).
MAP SENSOR SUPPLY VOLTAGE SPECIFICATIONS

Application Voltage
MR2 4.50-5.50
MAP SENSOR OUTPUT VOLTAGE DROP SPECIFICATIONS

Applied Vacuum In. Hg Output Voltage Drop
3.94 .3-.5
7.87 .7-.9
11.81 1.1-1.3
15.75 1.5-1.7
19.69 1.9-2.1
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