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 can cause driveability problems.
NOTE:
All voltage tests should be performed using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure.
AIRFLOW METER RESISTANCE
| Terminals |
Ohms |
°F (°C) |
| VS & E2 (ES300) |
200-600 |
N/A |
| VC & E2 (ES300) |
200-400 |
N/A |
| THA & E2 |
10,000-20,000 |
-4 (-20) |
| THA & E2 |
4000-7000 |
32 (0) |
| THA & E2 |
2000-3000 |
68 (20) |
| THA & E2 |
900-1300 |
104 (40) |
| THA & E2 |
400-700 |
140 (60) |
| THA & E2 |
200-400 |
176 (80) |
| FC & E1 |
Infinity |
N/A |
AIRFLOW METER MEASURING PLATE RESISTANCE
| Terminals |
Ohms |
Measuring Plate Position |
| FC & E1 |
Infinity |
Fully Closed |
| FC & E1 |
Zero |
Other Than Closed |
| VS & E2 |
200-600 |
Fully Closed |
| VS & E2 |
20-1000 |
Fully Open |
COLD START INJECTOR TIME SWITCH RESISTANCE
| Terminals |
Ohms |
°F (°C) |
| STA & STJ |
25-45 |
Less Than 59 (15) |
| STA & STJ |
65-85 |
More Than 86 (30) |
| STA & Ground |
25-85 |
N/A |
COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature |
Ohms |
| -4°F (-20°C) |
10,000-20,000 |
| 32°F (0°C) |
4000-7000 |
| 68°F (20°C) |
2000-3000 |
| 104°F (40°C) |
900-1300 |
| 140°F (60°C) |
400-700 |
| 176°F (80°C) |
200-400 |
COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature |
Ohms |
| 176°F (80°C) |
1480-1580 |
EGR GAS TEMPERATURE SENSOR RESISTANCE
| Sensor Temperature |
Ohms |
| 122°F (50°C) |
69,000-89,000 |
| 212°F (100°C) |
12,000-15,000 |
| 302°F (150°C) |
2000-4000 |
INTAKE AIR TEMPERATURE SENSOR RESISTANCE
| Terminals |
Ohms |
°F (°C) |
| THA & E2 |
| ES300 |
2000-3000 |
68 (20) |
| LS400 |
200-300 |
68 (20) |
ISC VALVE RESISTANCE
| Terminals |
Ohms |
| B1 & S1 Or S3 |
10-30 |
| B2 & S2 Or S4 |
10-30 |
KNOCK SENSOR RESISTANCE
| Terminals |
Ohms |
| Terminal To Body |
Infinity |
MAIN OXYGEN SENSOR HEATER RESISTANCE
| Sensor Temperature |
Ohms |
| 68°F (20°C) |
| ES300 |
11.7-14.3 |
| SC300, SC400 & LS400 |
5.1-6.3 |
TPS SPECIFICATIONS RESISTANCE
| TPS Terminals |
Conditions |
Ohms |
| ES300 |
| VTA & E2 |
Zero |
280-6400 |
| IDL & E2 |
.014" (.35 mm) |
5000 Or Less |
| IDL & E2 |
.028" (.71 mm) |
Infinity |
| VTA & E2 |
Throttle Valve Fully Open |
200-11,600 |
| VC & E2 |
N/A |
2700-7700 |
| LS400 & SC300 |
| VTA & E2 |
Zero |
200-1200 |
| IDL & E2 |
.0157" (.40 mm) |
2300 Or Less |
| IDL & E2 |
.026" (.65 mm) |
Infinity |
| VTA & E2 |
Throttle Valve Fully Open |
3300-10,000 |
| VC & E2 |
N/A |
4000-9000 |
| SC400 (Main) |
| VTA1 & E2 |
Zero |
200-800 |
| IDL1 & E2 |
.0157" (.40 mm) |
2300 Or Less |
| IDL1 & E2 |
.026" (.65 mm) |
Infinity |
| VTA1 & E2 |
Throttle Valve Fully Open |
3300-10,000 |
| VC & E2 |
N/A |
4000-9000 |
| SC400 (Sub) |
| VTA2 & E2 |
Zero |
200-800 |
| IDL2 & E2 |
.014" (.35 mm) |
2300 Or Less |
| IDL2 & E2 |
.022" (.55 mm) |
Infinity |
| VTA2 & E2 |
Throttle Valve Fully Open |
3300-10,000 |
| VC & E2 |
N/A |
4000-9000 |