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

Precis

750 RPM

27-33

2000 RPM

60-80

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

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
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)	5300-6700
68 (20)	2300-3000
176 (80)	300-420

OXYGEN SENSOR VOLTAGE TEST ⁽¹⁾

Application

Volts

Lean

0.1

Rich

1.0

⁽¹⁾	Test at normal operating temperature.