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.
1998 Volvo V70 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Sensor Range Charts
ATMOSPHERIC PRESSURE SENSOR VOLTAGE (C70, S70 & V70)
| Pressure - psi (kPa) | Voltage |
|---|---|
| 2.9 (20) | .3 |
| 5.8 (40) | 1.5 |
| 8.7 (60) | 2.5 |
| 11.6 (80) | 3.5 |
| 14.5 (100) | 4.5 |
COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature - °F (°C) | Ohms |
|---|---|
| 32 (0) | 7300 |
| 68 (20) | 2800 |
| 176 (80) | 300 |
| 212 (100) | 150 |
CO POTENTIOMETER RESISTANCE (S90 & V90)
| Application | Ohms | ||
|---|---|---|---|
| S90 & V90 (1) | 1000 | ||
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ENGINE SPEED (RPM) SENSOR RESISTANCE
| Application | Ohms |
|---|---|
| C70, S70 & V70 | 260-340 |
| S90 & V90 | 240-400 |
FUEL INJECTOR RESISTANCE
| Application | Ohms |
|---|---|
| All Models | 15.6-16.2 |
IDLE AIR CONTROL VALVE (COIL) RESISTANCE
| Application | Ohms | ||
|---|---|---|---|
| All Models (1) | 10-14 | ||
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INTAKE AIR TEMPERATURE RESISTANCE (C70, S70 & V70)
| Temperature - °F (°C) | Ohms |
|---|---|
| 68 (20) | 2500 |
MASS AIRFLOW (MAF) SENSOR RESISTANCE (S90 & V90)
| Application | Ohms | ||
|---|---|---|---|
| S90 & V90 (1) | 2.5-4 | ||
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OUTSIDE TEMPERATURE SENSOR RESISTANCE (C70, S70 & V70)
| Temperature - °F (°C) | Ohms |
|---|---|
| 14 (-10) | 2190-2270 |
| 32 (0) | 1390-1420 |
| 50 (10) | 890-930 |
| 68 (20) | 590-630 |
| 86 (30) | 400-430 |
| 104 (40) | 270-300 |
OXYGEN SENSOR HEATER RESISTANCE
| Temperature - °F (°C) | Ohms | |||
|---|---|---|---|---|
| C70, S70 & V70 Turbo (1) | ||||
| 68 (20) | 1.5-2.5 | |||
| 660 (350) | 6-10 | |||
| C70, S70 & V70 Non-Turbo, & S90 & V90 (1) | ||||
| 68 (20) | 3 | |||
| 660 (350) | 13 | |||
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THROTTLE POSITION SENSOR RESISTANCE
| Application | Ohms | |||
|---|---|---|---|---|
| C70, S70 & V70 (1) | ||||
| Idle | 900-1100 | |||
| Full Load | 2300-2900 | |||
| S90 & V90 (1) | ||||
| Idle | 1000 | |||
| Full Load | 2600 | |||
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Factory Service Tools
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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.