2001 Mercury Villager BaseFACTORY OEM SERVICE PROCEDURE

Engine Controls - Sensor Operating Range Charts: 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.

ENGINE COOLANT TEMPERATURE SENSOR & INTAKE AIR TEMPERATURE SENSOR

Temperature Β°F (Β°C) Output Voltage Ohms
14 (-10) 4.4 9200
68 (20) 3.5 2500
122 (50) 2.2 800
194 (90) 0.9 200
MASS AIRFLOW SENSOR

Engine RPM (1) Volts
800 1.2-1.4
1500 1.5-1.7
2000 1.7-1.9
2500 1.9-2.1
3000 2.1-2.3
(1) Measure voltage between White/Blue and Blue/Orange terminals.
TRANSMISSION FLUID TEMPERATURE SENSOR RESISTANCE

Coolant Temperature Β°F (Β°C) (1) Ohms
68 (20) 2200
187 (86) 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 TEST DH under SYSTEM TESTS in SELF DIAGNOSTICS - VILLAGER article.
Factory Service Tools

Use the Manual With the Right Hardware

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

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When to See a Mechanic

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

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

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