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 may cause driveability problems.

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

NOTE: BARO sensor cannot be tested or serviced separately. If a Code 14 is set and cannot be cleared, PCM must be replaced.

BAROMETRIC PRESSURE SENSOR OUTPUT VOLTAGE ⁽¹⁾

Vacuum - In. Hg.

⁽²⁾ Volts

3.84

3.36

2.66

1.93

1.26

0.58

⁽¹⁾	Measure voltage between breakout box test pins BP and SIGRTN.

⁽²⁾	Voltage may differ by plus or minus 15 percent.

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE ⁽¹⁾

Temperature - °F (°C)

Ohms

-4 (-20)

14,600-17,800

68 (20)

2200-2700

176 (80)

290-350

⁽¹⁾	Measure resistance between breakout box test pins ECT and SIGRTN.

IGNITION DIAGNOSTIC MONITOR VOLTAGE ⁽¹⁾

RPM

Volts

500

1.103

1000

1.257

1500

1.542

2000

1.768

2500

2.06

3000

2.15

3500

2.26

4000

2.50

4500

2.47

5000

2.40

⁽¹⁾	Measure voltage between breakout box test pins IDM and VPWR.

TP SENSOR OUTPUT VOLTAGE

Throttle Opening

⁽¹⁾ Voltage

1/4

0.50

1/2

2.75

3/4

3.88

Full Open

5.0

⁽¹⁾	Voltage may differ by 15 percent.

IAT SENSOR RESISTANCE ⁽¹⁾

Temperature °F (°C)

⁽²⁾ Ohms

32 (0)

72,100-79,400

55 (13)

54,300-58,600

77 (25)

29,700-36,300

110 (43)

17,900-19,300

185 (85)

3300-3700

⁽¹⁾	Measure resistance between breakout box test pins IAT and SIGRTN.

⁽²⁾	Resistance may differ by plus or minus 15 percent.