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. For connector and terminal identification, see WIRING DIAGRAMS article in this section.
| 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). |
| (1) | Measure hertz frequency with Multi-Use Tester (MUT). |
AIRFLOW METER HERTZ TEST (1)
| 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 |
COOLANT TEMPERATURE SENSOR RESISTANCE
| 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. |
| (1) | Measure resistance across disconnected sensor terminals. |
| (2) | Specifications apply to all models except Montero. |
EGR TEMPERATURE SENSOR RESISTANCE TEST (1) (2)
| 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 |
INTAKE AIR TEMPERATURE SENSOR RESISTANCE
| 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. |
| (1) | Measure between sensor terminal No. 1 and ground. |
| (2) | Test at normal operating temperature. |
OXYGEN SENSOR VOLTAGE TEST (1) (2)
THROTTLE POSITION SENSOR (TPS)
Measure total and variable resistance between specified TPS connector terminals. See TPS TEST TERMINALS table. Total resistance should be 3500-6500 ohms. Variable resistance should change smoothly between 3500 and 6500 ohms as throttle valve is moved from closed to wide open throttle.
| Application | Terminals No. |
|---|
| Total Resistance |
| Eclipse 1.8L | 1 & 2 |
| Eclipse 2.0L | 2 & 3 |
| All Others | 1 & 4 |
| Variable Resistance |
| Colt Vista, Expo, Montero, Pickup 3.0L, Precis, Ram-50 3.0L & Summit Wagon | 1 & 3 |
| Eclipse 1.8L | 2 & 3 |
| Eclipse 2.0L | 3 & 4 |
| All Others | 2 & 4 |
| Application | (2) Continuity |
|---|
| All Models | 4 Changes Per Revolution |
| (1) Measure continuity at back of speedometer. See appropriate wiring diagram in WIRING DIAGRAMS article in this section. (2) With ECM connector disconnected, turn speedometer cable to cycle reed switch on and off. |
| (1) | Measure continuity at back of speedometer. See appropriate wiring diagram in WIRING DIAGRAMS article in this section. |
| (2) | With ECM connector disconnected, turn speedometer cable to cycle reed switch on and off. |
VEHICLE SPEED SENSOR CONTINUITY TEST (1)
| Application | (2) Volts |
|---|
| All Models |
| Ignition Switch Off | 1 Or Less |
| Ignition Switch On | 4.5-4.9 |
| (1) Measure voltage at back of speedometer. See appropriate wiring diagram in WIRING DIAGRAMS article in this section. (2) With ECM connector disconnected, turn speedometer cable to cycle reed switch on and off. |
| (1) | Measure voltage at back of speedometer. See appropriate wiring diagram in WIRING DIAGRAMS article in this section. |
| (2) | With ECM connector disconnected, turn speedometer cable to cycle reed switch on and off. |
VEHICLE SPEED SENSOR VOLTAGE TEST (1)
