1998 Ford Taurus SHOFACTORY OEM SERVICE PROCEDURE

Engine Controls - Sensor Operating Range Charts - (EEC-V): Introduction

NOTE: For sensor information on Van E350 with 7.3L diesel, see TESTS W/CODES - DIESEL article.

Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it will cause driveability problems. To determine correct engine control system, see SYSTEM APPLICATION table.

SYSTEM APPLICATION

Application System
All Models EEC-V
NOTE: Unless specified otherwise, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with minimum 10-megohm input impedance.
DPFE SENSOR SPECIFICATIONS (1)

Pressure (psi) In. Hg (2) Volts
4.34 8.83 4.56
3.25 6.62 3.54
2.17 4.41 2.51
1.08 2.21 1.48
0 0 0.5
(1) This table applies to EEC-V models only.
(2) Voltage specifications are calculated for a VREF equaling 5 volts. Specification may differ by as much as 15 percent. See CIRCUIT TEST HE in appropriate TESTS W/CODES - EEC-V article in the ENGINE PERFORMANCE section for further testing.
ECT, IAT & TFT SENSOR SPECIFICATIONS (1)

Temperature °F (°C) Volts (2) (3) Resistance Ohms
50 (10) 3.51 58,750
68 (20) 3.07 37,300
86 (30) 2.60 24,270
104 (40) 2.13 16,150
122 (50) 1.70 10,970
140 (60) 1.33 7600
158 (70) 1.02 5370
176 (80) 0.78 3840
194 (90) 0.60 2800
212 (100) 0.46 2070
230 (110) 0.35 1550
(1) Values may differ by as much as 15 percent.
(2) Measure by backprobing signal circuit to ground.
(3) Measure between sensor terminals.
EFT SENSOR SPECIFICATIONS (1)

Temperature °F (°C) Volts (2) (3) Resistance Ohms
50 (10) 3.51 58,750
68 (20) 3.07 27,300
86 (30) 2.60 24,270
104 (40) 2.13 16,150
122 (50) 1.70 10,970
140 (60) 1.33 7700
158 (70) 1.02 5370
176 (80) 0.78 3840
194 (90) 0.60 2800
212 (100) 0.46 2070
248 (120) 0.27 1180
(1) Values may differ by as much as 15 percent.
(2) Measure by backprobing signal circuit to ground.
(3) Measure between sensor terminals.
FUEL RAIL PRESSURE SENSOR VOLTAGE

psi (kPa) Volts
0 (0) 0.5
10 (69) 1.1
20 (138) 1.6
30 (207) 2.2
40 (275) 2.8
50 (344) 3.4
60 (413) 3.9
70 (482) 4.5
TR SENSOR RESISTANCE

Selector Position (1) Ohms
Park 3770-4607
Reverse 1304-1593
Neutral 660-807
Overdrive 361-442
Second/Drive 190-232
First 78-95
(1) Values may differ by as much as 15 percent. Measure between Gray/Red and Light Blue/Yellow wires at TR sensor with transmission selector in specified position.
TP SENSOR VOLTAGE

Throttle Angle (1) Volts
0° .65
10° .97
20° 1.44
30° 1.90
40° 2.37
50° 2.84
60° 3.31
70° 3.78
80° 3.90
(1) Values may vary by 15 percent. For testing, see CIRCUIT TEST DH in appropriate TESTS W/CODES - EEC-V article in the ENGINE PERFORMANCE section.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.