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.

NOTE: Unless specified otherwise, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with minimum 10-megohm input impedance.

ENGINE COOLANT TEMPERATURE SENSOR & INTAKE AIR TEMPERATURE SENSOR SPECIFICATIONS ⁽¹⁾

Temperature °F (°C)

⁽²⁾⁽³⁾ Ohms

-4 (-20)

18 (-10)

36 (0)

50 (10)

4.5

68 (20)

86 (30)

2.25

104 (40)

1.5

122 (50)

140 (60)

0.5

158 (70)

0.46

176 (80)

0.36

194 (90)

0.3

212 (100)

0.26

230 (110)

0.16

248 (120)

0.1

⁽¹⁾	Values may differ by as much as 15 percent.

⁽²⁾	Measure by backprobing signal circuit to ground.

⁽³⁾	Measure resistance between sensor terminals.

MAP SENSOR SPECIFICATIONS ⁽¹⁾

Gauge Reading - In. Hg (mm Hg)

⁽²⁾ Output Voltage

0 (0)

2.9

5 (125)

2.4

10 (250)

1.9

15 (375)

1.6

20 (500)

1.1

25 (625)

0.60

⁽¹⁾	Values may differ by as much as 15 percent.

⁽²⁾	Measure by backprobing signal circuit to ground.

THROTTLE POSITION SENSOR SPECIFICATIONS

Throttle Angle

⁽¹⁾ Volts

Idle

.50

Partial

.75

25%

1.05

50%

2.9

75%

3.85

Full Open

4.8

⁽¹⁾	Values may vary by 15 percent.