1999 OLDSMOBILE ALERO MAP SENSOR

  • Tiny
  • Steveorch
  • 1999 Oldsmobile Alero

Engine Performance problem
1999 Oldsmobile Alero 4 cyl Front Wheel Drive Automatic

Where is it located and how do I determine if it is bad

Thursday, September 24th, 2009 AT 1:47 PM

1 Answer

  • Tiny
  • bluelightnin6
  • Expert
  • 17,063 posts

MAP sensor is located at left side of engine


http://www.2carpros.com/forum/automotive_pictures/261618_Graphic_184.jpg



Inspect the rubber nipple (fitting) from the MAP sensor to the throttle body. Repair as necessary.

CAUTION: When testing the MAP sensor, be sure that the harness wires are not damaged by the test meter probes.

Test the MAP sensor output voltage at the MAP sensor connector terminal B. With the ignition switch ON, and the engine OFF. Output voltage should be 4 to 5 volts.
Test the MAP sensor output voltage at the MAP sensor connector terminal B at a hot, neutral idle speed condition. The voltage should drop to 1.5 to 2.1 volts.
Test MAP sensor supply voltage at sensor connector terminal C with the ignition ON. The voltage should be approximately 5 volts.

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Thursday, September 24th, 2009 AT 9:44 PM

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