1999 PCED On Board Diagnostics II
SECTION 5: Pinpoint Tests
DC: Mass Air Flow (MAF) Sensor
Introduction
  DC: Pinpoint Tests  

Note

This Pinpoint Test is intended to diagnose the following:

Pinpoint Test Schematics and Connectors

2.0L Contour/Mystique



Mustang



2.0L Escort/Tracer, Windstar, Explorer/Mountaineer, 4.2L Econoline



2.0L Escort/Tracer, Windstar, 4.6L/5.4L E-Series, 4.2L/4.6L/5.4L F-Series, Expedition/Navigator



LS6/LS8



Continental



All Others



Ranger



Tables 



 VOLTAGE TO MASS AIR FLOW CONVERSION TABLE

Applications Voltage Signal
0.23V 0.27V 0.46V 2.44V 4.60V 4.79V
2.0L Escort/Tracer 2V, 3.0L 2V Taurus, 3.0L Flexible Fuel Taurus, 2.5L/3.0L Ranger 0.67 gm/sec 0.77 gm/sec 1.32 gm/sec 30.55 gm/sec 124.44 gm/sec 138.89 gm/sec
2.0L Contour/Mystique 0.70 gm/sec 0.80 gm/sec 1.36 gm/sec 30.86 gm/sec 125.00 gm/sec 138.89 gm/sec
2.5L Contour/Mystique,
3.0L 4V Taurus		 1.00 gm/sec 1.14 gm/sec 1.95 gm/sec 52.50 gm/sec 213.33 gm/sec 236.11 gm/sec
3.4L SHO,
4.2L/5.4L/6.8L F-250/F-350		 1.06 gm/sec 1.21 gm/sec 2.07 gm/sec 58.33 gm/sec 263.89 gm/sec 295.18 gm/sec
4.6L Town Car,
4.6L Crown Victoria/ Grand Marquis		 1.01 gm/sec 1.16 gm/sec 1.98 gm/sec 50.26 gm/sec 206.94 gm/sec 223.62 gm/sec
4.6L Mustang, 4.6L Continental 1.07 gm/sec 1.22 gm/sec 2.08 gm/sec 59.50 gm/sec 266.89 gm/sec 296.52 gm/sec
3.0L/3.9L LS6/LS8 0.90 gm/sec 1.03 gm/sec 1.76 gm/sec 52.27 gm/sec 222.22 gm/sec 240.48 gm/sec
3.8L Mustang, 4.0L Ranger 1.00 gm/sec 1.14 gm/sec 1.94 gm/sec 52.44 gm/sec 211.20 gm/sec 236.85 gm/sec
4.2L/4.6L/5.4L F-150,
4.6L/5.4L Expedition/Navigator		 1.06 gm/sec 1.21 gm/sec 2.07 gm/sec 58.33 gm/sec 263.89 gm/sec 295.18 gm/sec
2.0L Escort/Tracer 4V,
3.0L Windstar		 0.62 gm/sec 0.71 gm/sec 1.22 gm/sec 30.66 gm/sec 124.36 gm/sec 138.28 gm/sec
4.0L/5.0L Explorer/Mountaineer,
3.8L Windstar, 4.2L E-Series		 0.97 gm/sec 1.11 gm/sec 1.90 gm/sec 49.97 gm/sec 206.70 gm/sec 233.91 gm/sec
4.6L/5.4L E-Series 1.15 gm/sec 1.31 gm/sec 2.24 gm/sec 63.37 gm/sec 259.88 gm/sec 289.02 gm/sec
5.4L Lightning 1.17 gm/sec 1.34 gm/sec 2.28 gm/sec 62.50 gm/sec 397.22 gm/sec 375.00 gm/sec



 BAROMETRIC PRESSURE REFERENCE CHART

Barometric Pressure (in Hg) Barometric Pressure (kPa) BARO/MAP PID (Hz) Altitude above sea level (ft)
3.5 11.8 89.3  
5 16.9 92.8  
10 33.8 104.6  
15 50.7 117.0 14,000
20 67.5 129.6 10,000
21 70.9 132.5 9,000
22 74.3 135.4 8,000
23 77.7 138.3 7,000
24 81.1 141.1 6,000
25 84.4 144.0 5,000
26 87.8 146.9 4,000
27 91.2 149.8 3,000
28 94.6 152.8 2,000
29 97.9 155.8 1,000
30 101.3 158.9 0 (sea level)
31 104.7 162.0  
31.875 107.7 164.7  

 

 

  DC: Pinpoint Tests