Manifold Absolute Pressure (MAP) Sensor Inspection
- Check sensor O-ring (1) for damage and deterioration. Replace as necessary.
- Arrange new three 1.5 V batteries (2) in series and connect its positive terminal to "Vin" terminal and negative terminal to "Ground" terminal. Then, check voltage between "Vout" and "Ground". Also, check if voltage reduces when vacuum is slowly applied up to 400 mmHg by using vacuum pump (3). If check result is not satisfactory, replace manifold absolute pressure sensor (1).
CAUTION:
As connection to wrong terminal will cause damage to manifold absolute pressure sensor, make absolutely sure to connect properly as shown in the figure.
Manifold absolute pressure output voltage ("Vin" voltage: 4.5 - 5.5 V, ambient temp. 20 - 30°C (68 - 86°F))
MANIFOLD ABSOLUTE PRESSURE OUTPUT VOLTAGE
| Altitude (Reference) | Barometric pressure | Output voltage | |
|---|---|---|---|
| (ft (m)) | (mmHg) | (kPa) | (V) |
| 0 - 2000 (0-610) | 760 - 707 | 100-94 | 3.3 - 4.3 |
| 2001 - 5000 (611-1524) | Under 707, Over 634 | 94-85 | 3.0 - 4.1 |
| 5001 - 8000 (1525-2438) | Under 634, Over 567 | 85-76 | 2.7 - 3.7 |
| 8001 - 10000 (2439 - 3048) | Under 567, Over 526 | 76-70 | 2.5 - 3.3 |