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.
SENSOR OPERATING SPECIFICATIONS
Note. All voltage tests should be performed with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure.
| Terminals | Ohms | °F (°C) |
|---|
| ES250 |
| VS & E2 | 200-600 | N/A |
| VC & E2 | 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) |
| FC & E1 | Infinity | N/A |
| LS400 |
| 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) |
AIRFLOW METER RESISTANCE TEST
| Terminals | Ohms | Measuring Plate Position Position |
|---|
| FC & E1 | Infinity | Fully Closed |
| FC & E1 | Zero | Other Than Closed |
| VS & E2 | 200-600 | Fully Closed |
| VS & E2 (1) | 20-1000 | Fully Open |
| (1) Resistance will change in a wave pattern as measuring plate is opened. |
| (1) | Resistance will change in a wave pattern as measuring plate is opened. |
ES250 AIRFLOW METER MEASURING PLATE RESISTANCE TEST
| 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 |
COLD START INJECTOR TIME SWITCH RESISTANCE TEST
| 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 TEST
| Sensor Temperature | Ohms |
|---|
| 122°F (50°C) | 69,400-88,500 |
| 212°F (100°C) | 11,890-14,370 |
| 302°F (150°C) | 2790-3590 |
| (1) Measure between sensor terminals with sensor connector disconnected. |
| (1) | Measure between sensor terminals with sensor connector disconnected. |
EGR GAS TEMPERATURE SENSOR RESISTANCE TEST (1)
| Terminals | Ohms | °F (°C) |
|---|
| ES250: THA & E2 | 2000-3000 | 68 (20) |
| LS400: THA & E2 | 200-300 | 68 (20) |
| (1) Measure resistance with ECU connector connected. |
| (1) | Measure resistance with ECU connector connected. |
INTAKE AIR TEMPERATURE SENSOR RESISTANCE TEST (1)
| Terminals | Ohms |
|---|
| B1 & S1 Or S3 | 10-30 |
| B2 & S2 Or S4 | 10-30 |
ISC VALVE RESISTANCE TEST
| Sensor Temperature | Ohms |
|---|
| 68°F (20°C) | 5.1-6.3 |
| (1) Measure resistance between terminals +B and HT of oxygen sensor 4-pin connector. |
| (1) | Measure resistance between terminals +B and HT of oxygen sensor 4-pin connector. |
MAIN OXYGEN SENSOR HEATER RESISTANCE TEST (1)
| TPS Terminals | Conditions | Ohms |
|---|
| ES250 |
| VTA & E2 | (1) Zero | 300-6300 |
| IDL & E2 | (1) .012" (.30 mm) | 2300 or less |
| IDL & E2 | (1) .028" (.71 mm) | Infinity |
| VTA & E2 | Throttle Valve Fully Open | 350-10,300 |
| VC & E2 | N/A | 4250-8250 |
| LS400 |
| VTA & E2 | (1) Zero | 200-1200 |
| IDL & E2 | (1) .0157" (.40 mm) | 2300 or less |
| IDL & E2 | (1) .0335" (.85 mm) | Infinity |
| VTA & E2 | Throttle Valve Fully Open | 3300-10,000 |
| VC & E2 | N/A | 4000-9000 |
| (1) Clearance between throttle lever and stop screw. |
| (1) | Clearance between throttle lever and stop screw. |
TPS SPECIFICATIONS RESISTANCE TEST
