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 SENSOR TERMINAL VOLTAGES
| Terminal Wire Color |
Ignition On: Volts |
Engine Running: Volts |
| Black/White(Pwr. Sply.) |
12.0 |
12.0 |
| Green/Orange (Burn-Off) |
0 |
0 |
| Green/Blk. (Airflow Mass) |
1.0-2.0 |
1.9-5.0 |
| Green/White(Ground) |
0 |
0 |
| Black/Orange (Ground) |
0 |
0 |
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 |
ECT SENSOR RESISTANCE
| Temperature |
Ohms |
| -4°F (-20°C) |
14,600-17,800 |
| 68°F (20°C) |
2200-2700 |
| 176°F (80°C) |
280-350 |
INTAKE AIR THERMOSENSOR RESISTANCE
| Application |
Ohms |
| 77°F (25°C) |
29,700-36,300 |
| 185°F (85°C) |
3300-3700 |
OXYGEN SENSOR
| Operating Condition |
Voltage |
| Rapidly Accelerating |
0.5-1.0 |
| Deceleration |
0.0-0.4 |
TP SENSOR VOLTAGE
| Red Wire Volts |
Blue Wire Volts: Closed Throttle |
Blue Wire Volts: WOT |
| 4.50-4.59 |
.37-.54 |
3.58-4.23 |
| 4.60-4.69 |
.38-.55 |
3.66-4.32 |
| 4.70-4.79 |
.39-.56 |
3.74-4.41 |
| 4.80-4.89 |
.40-.57 |
3.82-4.51 |
| 4.90-4.99 |
.40-.58 |
3.90-4.60 |
| 5.00-5.09 |
.41-.60 |
3.97-4.70 |
| 5.10-5.19 |
.42-.61 |
4.05-4.79 |
| 5.20-5.29 |
.43-.62 |
4.13-4.88 |
| 5.30-5.39 |
.44-.63 |
4.21-4.98 |
| 5.40-5.49 |
.44-.64 |
4.29-5.07 |
| 5.50 |
.44-.66 |
4.29-5.17 |
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 |