Absolute Pressure Sensor: Testing and Inspection

1. Remove absolute pressure sensor with its harness connector connected.
2. Turn ignition switch "ON" and check output voltage between ECM terminal 066 and engine ground.
The voltage should be 1.8 to 4.8 V.
3. Use pump to apply vacuum of -26.7 kPa (-200 mmHg, -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 vacuum below -93.3 kPa (-700 mmHg, -27.56 inHg) or pressure over 101.3 kPa (760 mmHg, 29.92 inHg).

4. If NG, replace absolute pressure sensor.