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.
| BARO Pressure - In. Hg | Volts |
|---|
| 0 | 2.8-3.0 |
| 5 | 2.3-2.5 |
| 10 | 1.8-2.0 |
| 15 | 1.3-1.5 |
| 20 | .8-1.0 |
| 25 | .3-.5 |
| (1) Measure voltage at appropriate ECU terminals. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. |
| (1) | Measure voltage at appropriate ECU terminals. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. |
ATMOSPHERIC PRESSURE SENSOR VOLTAGE TEST (1)
| Temperature - °F (°C) | Ohms |
|---|
| 4 (-20) | 15,000-18,000 |
| 68 (20) | 1000-4000 |
| 176 (80) | 200-400 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
COOLANT TEMP (TW) SENSOR RESISTANCE TEST (1)
| Temperature - °F (°C) | Ohms |
|---|
| 4 (-20) | 15,000-18,000 |
| 68 (20) | 1000-4000 |
| 176 (80) | 200-400 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
INTAKE AIR TEMP (TA) SENSOR RESISTANCE TEST (1)
| Vacuum Applied - In. Hg. | Volts |
|---|
| 0 | 2.8-3.0 |
| 5 | 2.3-2.5 |
| 10 | 1.8-2.0 |
| 15 | 1.3-1.5 |
| 20 | .8-1.0 |
| 25 | .3-.5 |
| (1) Measure voltage at appropriate ECU terminals. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. |
| (1) | Measure voltage at appropriate ECU terminals. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. |
MAP SENSOR VOLTAGE TEST (1)
| Position | Volts (Approx.) |
|---|
| Accord & Prelude |
| Fully Closed | 1.2 |
| Fully Open | 4.0 |
| Civic & CRX |
| Fully Closed | 1.0 |
| Fully Open | N/A |
| (1) Measure voltage at appropriate ECU terminals. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Voltage should increase smoothly as vacuum is applied. |
| (1) | Measure voltage at appropriate ECU terminals. See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Voltage should increase smoothly as vacuum is applied. |
EGR LIFT SENSOR VOLTAGE TEST (1)
| Condition | Volts |
|---|
| Lean | Less Than 0.4 |
| Rich | Greater Than 0.6 |
| (1) Measure voltage between ground and O2 sensor terminal using a high-impedance DVOM. |
| (1) | Measure voltage between ground and O2 sensor terminal using a high-impedance DVOM. |
OXYGEN SENSOR VOLTAGE TEST (1)
| Condition | (1) Volts |
|---|
| Throttle Valve |
| Fully Closed | .5 |
| Wide Open | 4.5 |
| (1) Voltage change from fully closed to wide open should be smooth. |
| (1) | Voltage change from fully closed to wide open should be smooth. |
THROTTLE ANGLE (POSITION) SENSOR SPECIFICATIONS
| Application | Volts |
|---|
| All Models (1) | (2) 0-5 |
| (1) Backprobe terminals at sensor. (2) Pulses between 0 and 5 volts with sensor turning. |
| (1) | Backprobe terminals at sensor. |
| (2) | Pulses between 0 and 5 volts with sensor turning. |
VEHICLE SPEED SENSOR VOLTAGE TEST
