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 MANUALSHONDA1998CIVIC DX, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROLS - SENSOR RANGE CHARTSINTRODUCTION
1998 Honda Civic DX, 2D Coupe, Automatic
Engine Controls - Sensor Range Charts: Introduction
1998 Honda Civic DX, 2D Coupe, AutomaticSECTION Introduction
Sensor operating range information can help determine if a sensor is out of calibration. Although an out-of-calibration sensor may not set a trouble code, 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-megaohm input impedance.
COOLANT TEMPERATURE (ECT) SENSOR TEST
| Temperature - °F (°C) | (1) Volts | |||||
|---|---|---|---|---|---|---|
| Accord | ||||||
| -4 (-20) | 5.0 | |||||
| 176-200 (80-93) | 0.4-0.7 | |||||
| 302 (150) | 0.0 | |||||
| (2)Ohms | ||||||
| Civic, CR-V, Oasis, Odyssey & Prelude | ||||||
| 32 (0) | 5,000 | |||||
| 104 (40) | 1,000 | |||||
| 176 (80) | 500 | |||||
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FUEL TANK PRESSURE SENSOR
| Absolute Pressure | Volts |
|---|---|
| Zero In.Hg (Fuel Filler Cap Off) | 2.5 |
INTAKE AIR TEMPERATURE (IAT) SENSOR TEST
| Temperature - °F (°C) | (1) Volts | |||||
|---|---|---|---|---|---|---|
| Accord | ||||||
| -4 (-20) | 5.0 | |||||
| 302 (150) | 0.0 | |||||
| (2)Ohms | ||||||
| Civic, CR-V, Oasis, Odyssey & Prelude | ||||||
| 32 (0) | 5,000 | |||||
| 104 (40) | 1,000 | |||||
| 176 (80) | 500 | |||||
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MAP SENSOR VOLTAGE TEST
| Vacuum Applied - In. Hg (kPa) | (1) Volts | |||
|---|---|---|---|---|
| Accord, Oasis & Odyssey | ||||
| 0 (0) | 0.0 | |||
| 30 (101) | 5.0 | |||
| Civic, CR-V & Prelude | ||||
| 5 | 2.5 | |||
| 10 | 2.0 | |||
| 15 | 1.5 | |||
| 20 | 1.0 | |||
| 25 | 0.5 | |||
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EGR LIFT SENSOR VOLTAGE TEST
| Position | (1) Volts (Approximate) | ||
|---|---|---|---|
| Idle | 1.2 | ||
| 8 In.Hg (27 kPa) | 4.3 | ||
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OXYGEN SENSOR VOLTAGE TEST (1)
| Condition | Volts | ||
|---|---|---|---|
| Lean | Less Than 0.4 | ||
| Rich | Greater Than 0.6 | ||
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THROTTLE POSITION (TP) SENSOR
| Condition | Volts/Value | ||||||
|---|---|---|---|---|---|---|---|
| Throttle Valve | |||||||
| Fully Closed | |||||||
| Accord | (1) 10% | ||||||
| Except Accord | (2) 0.5 | ||||||
| Wide Open | |||||||
| Accord | (1) 90% | ||||||
| Except Accord | (2) 4.5 | ||||||
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VEHICLE SPEED SENSOR (VSS) TEST
| Application | (1) Volts | ||||
|---|---|---|---|---|---|
| All Models | (2) | ||||
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RENDER: 1.0x
NO RELATED
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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.