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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.

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) 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.
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) 2200
(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 in SELF DIAGNOSTICS - VILLAGER article.