Engine Controls - Sensor Operating Range Charts: Introduction: Notes

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. For connector and terminal identification, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

AIRFLOW METER HERTZ TEST ⁽¹⁾

Condition

2.4L

750 RPM

40-60

2000 RPM

85-105

3.0L

700 RPM

25-45

2000 RPM

70-90

⁽¹⁾	Measure hertz frequency with Multi-Use Tester (MUT-II).

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)		Ohms
Pickup 2.4L
32 (0)		5900
68 (20)		2500
104 (40)		1100
176 (80)		300
Pickup 3.0L
32 (0)		5800
68 (20)		2400
104 (40)		1100
176 (80)		300

EGR TEMPERATURE SENSOR RESISTANCE TEST ⁽¹⁾⁽²⁾

Temperature °F (°C)

Ohms

122 (50)

60-83

212 (100)

11-14

⁽¹⁾	Measure resistance across disconnected sensor terminals.

⁽²⁾	Specifications apply to all models.

INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
32 (0)	6000
68 (20)	2700
176 (80)	400

OXYGEN SENSOR VOLTAGE TEST ⁽¹⁾

Application

Volts

Lean

0.1

Rich

1.0

⁽¹⁾	Test at normal operating temperature.