INTRODUCTION
Sensor operating range information (if available) 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.
SENSOR RANGE CHARTS
| Condition | (1) Ohms |
|---|
| Cold Engine | 70 |
| Warm Engine | 800 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
COOLANT TEMP SENSOR RESISTANCE (2.3L)
| Temperature °F (°C) | (1) Ohms |
|---|
| 14 (-10) | 7000-12,000 |
| 50 (10) | 3000-5000 |
| 68 (20) | 2000-3000 |
| 122 (50) | 700-1000 |
| 176 (80) | 200-400 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
COOLANT TEMP SENSOR RESISTANCE (2.6L)
| Temperature °F (°C) | (1) Ohms |
|---|
| 0 (-18) | 25,000 |
| 20 (-7) | 13,500 |
| 40 (4) | 7500 |
| 70 (21) | 3400 |
| 100 (38) | 1800 |
| 160 (71) | 450 |
| 212 (100) | 185 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
COOLANT TEMP SENSOR RESISTANCE (2.8L)
| Temperature °F (°C) | (1) Ohms |
|---|
| 5 (-15) | 21,450 |
| 23 (-5) | 12,300 |
| 41 (5) | 7280 |
| 68 (20) | 3520 |
| 104 (40) | 1459 |
| 158 (70) | 467 |
| 212 (100) | 185 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
COOLANT TEMP SENSOR RESISTANCE (3.1L)
| Temperature °F (°C) | (1) Ohms |
|---|
| 32 (0) | 28,000 |
| 68 (20) | 12,100 |
| 109 (43) | 5900 |
| 176 (80) | 1700 |
| 212 (100) | 1000 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
EGR TEMP SENSOR RESISTANCE (2.6L CALIF.)
| Altitude Feet | (1) Volts |
|---|
| Below 1000 | 3.8-5.5 |
| 1000-2000 | 3.6-5.3 |
| 2000-3000 | 3.5-5.1 |
| 3000-4000 | 3.3-5.0 |
| 4000-5000 | 3.2-4.8 |
| 5000-6000 | 3.0-4.6 |
| 6000-7000 | 2.9-4.5 |
| 7000-8000 | 2.8-4.3 |
| 8000-9000 | 2.6-4.2 |
| (1) Measure voltage at Light Green wire terminal. |
| (1) | Measure voltage at Light Green wire terminal. |
MAP SENSOR VOLTAGE (2.8L)
| Condition | (1) Volts |
|---|
| Vacuum hose disconnected | Greater than 2.5 |
| Vacuum hose connected | Less than 2.5 |
| (1) Measure voltage across terminals No. 1 and 2. |
| (1) | Measure voltage across terminals No. 1 and 2. |
MAP SENSOR VOLTAGE (2.6L)
| Throttle Position | (1) Volts |
|---|
| Closed | 1-1.5 |
| Wide open | 4.5-4.8 |
| (1) Measure voltage at Pink wire and Light Green wire terminals with ignition on. |
| (1) | Measure voltage at Pink wire and Light Green wire terminals with ignition on. |
MAP SENSOR VOLTAGE (3.1L)
| Condition | Volts |
|---|
| Lean | 0.1 |
| Rich | 0.9 |
| (1) Test at normal operating temperature. |
| (1) | Test at normal operating temperature. |
OXYGEN SENSOR VOLTAGE TEST (1)
| Position | (2) Volts |
|---|
| Closed Throttle | 0.48 |
| Open Throttle | 4.5 |
| (1) For terminal locations, see appropriate WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. (2) Voltage should increase smoothly from closed to wide open throttle. |
| (1) | For terminal locations, see appropriate WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. |
| (2) | Voltage should increase smoothly from closed to wide open throttle. |
THROTTLE POSITION SENSOR VOLTAGE (1)
| Application | (2) Continuity |
|---|
| All Models | 4 Changes Per Revolution |
| (1) Measure continuity at back of speedometer. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. (2) Turn speedometer cable to cycle reed switch on and off. |
| (1) | Measure continuity at back of speedometer. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. |
| (2) | Turn speedometer cable to cycle reed switch on and off. |
VEHICLE SPEED SENSOR CONTINUITY TEST (1)
| Application | (2) Volts |
|---|
| All Models | Less than 10 |
| (1) Measure voltage at back of speedometer. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. (2) With ignition on, turn speedometer cable to cycle reed switch on and off. |
| (1) | Measure voltage at back of speedometer. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. |
| (2) | With ignition on, turn speedometer cable to cycle reed switch on and off. |
VEHICLE SPEED SENSOR VOLTAGE TEST (1)
