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.
AIRFLOW METER TERMINAL RESISTANCE
| Terminals |
Fully Closed Ohms |
Fully Open Ohms |
| E2 & Vs |
20-400 |
20-1000 |
| E2 & Vc |
100-300 |
100-300 |
| E2 & Vb |
200-400 |
200-400 |
| E2 & THAa |
| -4°F (-20°C) |
13,600-18,400 |
13,600-18,400 |
| 68°F (20°C) |
2210-2690 |
2210-2690 |
| 140°F (60°C) |
493-667 |
493-667 |
| E1 & Fc |
Infinite |
0 |
ENGINE COOLANT TEMPERATURE (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 With No Vacuum Applied |
Ohms @ 5.9 in. Hg |
| "A" & "B" |
2700 |
2700 |
| "A" & "C" |
500 |
2700 |
| "B" & "C" |
2400 |
100 |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Application |
Ohms |
| 77°F (25°C) |
29,700-36,300 |
| 185°F (85°C) |
3300-3700 |
OXYGEN SENSOR
| Operating Condition |
Volts |
| Rapidly Accelerating |
0.5-1.0 |
| Deceleration |
0.0-0.4 |
THROTTLE POSITION SENSOR CONTINUITY
| Condition |
Continuity Between Terminals "C" & "D" |
| .020" (.50 mm) |
Yes |
| .028" (.70 mm) |
No |
THROTTLE POSITION SENSOR VOLTAGE
| Wire Color To Ground |
Closed Throttle Volts |
WOT Volts |
| Red/Blue (2M) |
0.1-1.0 |
3.6-5.0 |
THROTTLE POSITION (TP) SENSOR RESISTANCE
| Application |
Ohms |
| Between Terminals "A" & "D" |
3000-6000 |
| Between Terminals "B" & "D" |
| Closed Throttle |
About 1000 Or Less |
| Wide Open Throttle |
3000-6000 |