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Manifold Absolute Pressure Check: Troubleshooting

TROUBLESHOOTING CHART

Step Action Value(s) Yes No
1
  1. Turn the ignition OFF.
  2. Connect a scan tool to the Data Link Connector (DLC).
  3. Turn the ignition ON.
  4. Compare the Manifold Absolute Pressure (MAP) sensor voltage reading from the scanner with that from a known good vehicle.

Is the difference in the 2 voltage readings less than the value specified?		 0.4 V Go to Step 2. Go to Step 5.
2
  1. Turn the ignition OFF.
  2. Connect a scan tool to the DLC.
  3. Disconnect the MAP sensor vacuum line.
  4. Connect a hand vacuum pump to the MAP sensor.
  5. Turn the ignition ON.
  6. Note the MAP sensor voltage.
  7. Apply 60 kPa (17.7 in. Hg) of vacuum to the MAP sensor and note the voltage change.

Is the difference in voltage readings more than the value specified?		 1.1 - 1.5 V System OK Go to Step 3.
3 Inspect the MAP sensor connector terminals.
Is the problem found?		 - Go to Step 4. Go to Step 5.
4 Repair the MAP sensor connector terminals as needed.
Is the repair complete?		 - System OK -
5 Replace the manifold absolute pressure sensor.
Is the repair complete?		 - System OK -
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