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Test NTC-8A: Checking Map Sensor Calibration

  1. Turn engine off. Install vacuum tee in MAP sensor vacuum hose. Install vacuum gauge. Start engine, and let it idle. If engine will not idle, maintain a constant RPM above idle. Go to next step.
  2. Using scan tool, read MAP sensor vacuum. If reading is not within one in. Hg of vacuum gauge reading, replace MAP sensor and perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES  on AB body, or TEST VER-2A: ROAD TEST VERIFICATION  on all other bodies. If reading is within one in. Hg of vacuum gauge reading, MAP sensor is operating properly. Test is complete.
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