Atmospheric Pressure (Pa) Sensor
Disconnect vacuum hose to PA sensor. Using a barometer, measure barometric pressure (in. Hg). Measure voltage between ECU terminals C13 (positive) and C12 (negative). Ensure voltage reading for each model is as specified in ATMOSPHERIC PRESSURE (PA) SENSOR VOLTAGE TEST table. If PA sensor voltage output is not as specified, replace PA sensor.
ATMOSPHERIC PRESSURE (PA) SENSOR VOLTAGE TEST
| BARO Pressure - In. Hg | Volts |
|---|---|
| 0 | 2.8-3.0 |
| 5 | 2.3-2.5 |
| 10 | 1.8-2.0 |
| 15 | 1.3-1.5 |
| 20 | .8-1.0 |
| 25 | .3-.5 |