Manifold Absolute Pressure (Map)/Manifold Differential Pressure (MDP) Sensor

To test MAP sensor on vehicle, turn ignition on. Connect scan tool to Data Link Connector (DLC). Connect a hand-held vacuum pump to MAP sensor. Observe scan tool display as specified vacuum is applied. See MAP SENSOR OUTPUT SIGNAL TABLE (ON-VEHICLE) .
If scan tool reading is not within specification, see DTC P1408 in TESTS W/CODES article. To bench test pressure sensor, see MAP SENSOR OUTPUT VOLTAGE TABLE (OFF-VEHICLE) . If voltage is not within specification, replace MAP sensor.

CAUTION: Damage to MAP sensor will occur if connections are made incorrectly.

MAP SENSOR OUTPUT SIGNAL (ON-VEHICLE)

Vacuum (In. Hg)

Scan Tool Display (kPa)

X-90

⁽¹⁾ *

⁽¹⁾	MAP specification information not available.

MAP SENSOR OUTPUT VOLTAGE (OFF-VEHICLE)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Output Voltage

2.4-4.4

2.1-4.1

1.9-3.9

1.6-3.6

1.3-3.3

⁽¹⁾	MAP sensor output voltage is tested with three 1.5-volt batteries connected in series (output 4.5-5.0 volts). Positive lead of batteries is connected to "Vin" terminal. Negative lead of batteries is connected to "Ground" terminal. Check output voltage between "Vout" and "Ground" terminals.

⁽²⁾	Voltage should reduce when up to 15 in. Hg of vacuum is applied to MAP sensor.