Absolute Pressure Sensor: Testing and Inspection

COMPONENT INSPECTION
Absolute Pressure Sensor
1. Remove absolute pressure sensor with its harness connector connected.
2. Remove hose from absolute pressure sensor.





3. Turn ignition switch "ON" and check output voltage between ECM terminal (66) and engine ground.
The voltage should be 3.2 to 4.8 V.
4. Use pump to apply vacuum of -26.7 kPa (-200 mm Hg, -7.87 inHg) to absolute pressure sensor as shown in figure and check the output voltage.
The voltage should be 1.0 to 1.4 V lower than the value measured in step 3.

CAUTION:
- Always calibrate the vacuum pump gauge when using it.
- Do not apply pressure below -93.3 kPa (-700 mm Hg, -27.56 inHg) or over 101.3 kPa (760 mmHg, 29.92 inHg).

5. If NG, replace absolute pressure sensor.