Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSAAB1995900 SE, 4D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESENSOR RANGE CHARTSENGINE CONTROLS - SENSOR OPERATING RANGE CHARTS - 2.5L V6INTRODUCTION
1995 Saab 900 SE, 4D Hatchback, Automatic
Engine Controls - Sensor Operating Range Charts - 2.5L V6: Introduction
1995 Saab 900 SE, 4D Hatchback, AutomaticSECTION 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 with a Digital Volt-Ohmmeter (DVOM) with minimum 10-megohm input impedance.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (1)
| Temperature - °F (°C) | Ohms | ||
|---|---|---|---|
| -22 (-30) | 20,000-30,000 | ||
| 68 (20) | 8300-10,600 | ||
| 104 (40) | 2300-2700 | ||
| 140 (60) | 565-670 | ||
| 176 (80) | 295-365 | ||
| 194 (90) | 200-240 | ||
| 230 (110) | 140-160 | ||
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INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (1)
| Temperature - °F (°C) | Ohms | ||
|---|---|---|---|
| 4 (-20) | 15,000 | ||
| 32 (0) | 5800 | ||
| 68 (20) | 2600 | ||
| 86 (30) | 1700 | ||
| 176 (80) | 320 | ||
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HEATED OXYGEN SENSOR (HO2S) VOLTAGE
| Condition | Volts |
|---|---|
| Lean | 0-0.4 |
| Rich | 0.6-1.0 |
THROTTLE POSITION (TP) SENSOR RESISTANCE
| Position | Ohms | ||
|---|---|---|---|
| Idle Position (1) | 2300-3400 | ||
| Wide Open Throttle (1) | 700-1000 | ||
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RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.