Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2002 Lincoln Town Car, 2002 Lincoln Navigator, 2002 Lincoln LS, 2002 Lincoln Continental, and 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test when directed by QUICK TEST. This system test is intended to diagnose:
- Barometric Pressure (BARO) Sensor
- Wiring Harness Circuits (BARO SIG, SIG RTN & VREF)
- Powertrain Control Module (PCM)
VREF voltage should be 4-6 volts. BARO PID reading is in frequency/volts.
BARO SENSOR SPECIFICATIONS
| In. Hg (kPa) | Frequency (Hz) | Altitude Above Sea Level (Feet) |
|---|---|---|
| 3.5 (11.8) | 89.3 | N/A |
| 5 (16.9) | 92.8 | N/A |
| 10 (33.8) | 104.6 | N/A |
| 15 (50.7) | 117.0 | 14000 |
| 20 (67.5) | 129.6 | 10000 |
| 21 (70.9) | 132.5 | 9000 |
| 22 (74.3) | 135.4 | 8000 |
| 23 (77.7) | 138.3 | 7000 |
| 24 (81.1) | 141.1 | 6000 |
| 25 (84.4) | 144.0 | 5000 |
| 26 (87.8) | 146.9 | 4000 |
| 27 (91.2) | 149.8 | 3000 |
| 28 (94.6) | 152.8 | 2000 |
| 29 (97.9) | 155.8 | 1000 |