Barometric Pressure Sensor

NOTE: Enter this procedure only when a Code 14 is displayed during QUICK TESTS procedure or when directed here from another PINPOINT TEST. To prevent unnecessary replacement of components, note following non-EEC items may be at fault: unusually high or low atmospheric pressure, blocked vacuum lines, or basic mechanical engine components.

Fig 1: Identifying BARO Sensor Circuits (BARO)

Turn ignition off. Connect BOB. Remove dust cover from BARO sensor, located on passenger side cowl. Turn ignition on. Connect vacuum pump to BARO sensor. Measure voltage between pins BARO and SIGRTN on BOB while applying vacuum to BARO sensor. See BAROMETRIC PRESSURE SENSOR OUTPUT VOLTAGE table. Replace BARO sensor if voltage is not as specified.

BAROMETRIC PRESSURE SENSOR OUTPUT VOLTAGE

Vacuum (In. Hg)

⁽¹⁾ Voltage

3.84

3.36

2.66

1.93

1.26

.58

⁽¹⁾	Voltage may differ by 15 percent.