Engine Controls - Sensor Operating Range Charts 3.0L: Introduction

1998 Mercury Villager GS, Van CargoSECTION Introduction

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.

EGR TEMPERATURE (EGRT) SENSOR RESISTANCE

Coolant Temperature °F (°C) M/ohms
68-120 (20-49) 2.25-2.55
130-148 (55-65) 1.75-2.25
150-165 (66-74) 1.40-1.75
168-190 (76-88) 1.00-1.40
ENGINE COOLANT TEMPERATURE SENSOR

Temperature °F (°C) Output Voltage Ohms
68 (20) 3.5 2500
122 (50) 2.2 800
194 (90) 0.9 200
INTAKE AIR TEMPERATURE SENSOR

Temperature °F (°C) Output Voltage Ohms
68 (20) 3.5 2500
122 (50) 2.2 800
194 (90) 0.9 200
MASS AIRFLOW SENSOR

Engine RPM (1) PID Value
800 4-6
1500 8-9
2000 11-12
2500 15-16
3000 18-19
(1) Value measured in Grams per Second (G/S). Value may vary by 15 percent.
PULSE SIGNAL GENERATOR SENSOR

Vehicle Speed (MPH) (1) Volts (AC)
10 0.59
15 0.76
20 0.97
25 1.13
30 1.28
(1) Specification is approximate.
TRANSMISSION FLUID TEMPERATURE SENSOR RESISTANCE

Coolant Temperature °F (°C) (1) Ohms
68 (20) 1125
176 (80) 300
(1) Specification is approximate.
THROTTLE POSITION SENSOR

Throttle Position (1) Volts
Closed .4
1/4 1.3
Half Open 2.2
3/4 3.1
Fully Open 4.1
(1) Values may vary by 15 percent. For testing, see CIRCUIT TEST DH in TESTS W/CODES article.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.