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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 this section.
AIRFLOW METER HERTZ TEST (1)

Condition Hz
Colt, Colt 200, Mirage & Summit
1.8L
700 RPM 23-49
2000 RPM 51-91
Diamante
700 RPM 21-47
2000 RPM 51-97
Eclipse
1.8L
700 RPM 25-40
2000 RPM 67-88
2.0L
750 RPM 25-50
2000 RPM
Non-Turbo 70-90
Turbo 60-85
Colt Vista, Expo & Summit Wagon
1.8L
750 RPM 23-49
2000 RPM 51-91
2.4L
750 RPM 18-44
2000 RPM 43-83
Galant
SOHC
750 RPM 18-44
2000 RPM 64-104
Montero
700 RPM 22-48
2000 RPM 60-100
Pickup & Ram-50
2.4L
750 RPM 40-60
2000 RPM 85-105
3.0L
700 RPM 25-45
2000 RPM 70-90
Precis
750 RPM 27-33
2000 RPM 60-80
Stealth & 3000GT
700 RPM 25-50
2000 RPM 70-100
(1) Measure hertz frequency with Multi-Use Tester (MUT).
COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C) Ohms
Eclipse
68 (20) 2200-2600
176 (80) 264-328
Pickup 2.4L & Ram-50 2.4L
32 (0) 5900
68 (20) 2500
104 (40) 1100
176 (80) 300
All Others
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 except Montero.
INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C) Ohms
Precis
32 (0) 5400-6600
68 (20) 2300-2970
176 (80) 310-430
All Others
32 (0) 6000
68 (20) 2700
176 (80) 400
OXYGEN SENSOR VOLTAGE TEST (1)(2)

Application Volts
All Models
Lean 0.1
Rich 1.0
(1) Measure between sensor terminal No. 1 and ground.
(2) Test at normal operating temperature.