Engine Controls - Sensor Operating Range Charts: 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.
AIR CHARGE TEMPERATURE (ACT) SENSOR RESISTANCE
| Temperature |
Ohms |
| 77°F (25°C) |
29,000-36,300 |
| 185°F (85°C) |
3300-3700 |
AIRFLOW SENSOR TERMINAL VOLTAGES
| Terminal Wire Color |
Ignition On: Volts |
Engine Running: Volts |
| Red/Black (Power Supply) |
12.0 |
12.0 |
| Black/Blue (Airflow Mass) |
| M/T |
1.0-1.5 |
1.5-5.0 |
| A/T |
0 |
0.6-0.7 |
| Black/Green (Ground) |
0 |
0 |
AIRFLOW MTR TERM RESISTANCE
| Terminals |
Temperature |
Ohms |
| E2 & Vs |
| Closed |
68°F (20°C) |
20-600 |
| Open |
68°F (20°C) |
20-1000 |
| E2 & Vc |
68°F (20°C) |
200-400 |
| E2 & THA |
-4°F (-20°C) |
10,000-20,000 |
| 68°F (20°C) |
2000-3000 |
| 140°F (60°C) |
400-700 |
ECT SENSOR RESISTANCE
| Temperature |
Ohms |
| -4°F (-20°C) |
14,600-17,800 |
| 68°F (20°C) |
2200-2700 |
| 104°F (40°C) |
1000-1300 |
| 140°F (60°C) |
500-650 |
| 176°F (80°C) |
290-350 |
EGR POSITION SENSOR RESISTANCE
| Terminals |
Ohms |
| "A" & "B" |
5000 |
| "A" & "C" |
700-5000 |
| "B" & "C" |
700-5000 |
OXYGEN SENSOR
| Operating Condition |
Voltage |
| Rapidly Accelerating |
0.5-1.0 |
| Deceleration |
0.0-0.4 |
TP SENSOR CONTINUITY
| Test Condition |
Continuity |
| .006" (.15 mm) |
Yes |
| .020" (.50 mm) |
No |