INTRODUCTION
Sensor operating range information is supplied so that it can be determined if a sensor is out of calibration. A sensor that is out of calibration may not set a trouble code; however, it may cause driveability problems. See PIN VOLTAGE CHART S article for ECU terminal identification.
AIRFLOW METER VOLTAGE
| Application | ECU Terminals | (1) Volts |
|---|
| PFI |
| 4-Cyl. (except 2.0L DOHC) | 10 & 14 | 2.2-3.2 |
| 2.0L DOHC | 10 & 24 | 2.2-3.2 |
| V6 | (2) | (2) |
| TBI |
| 2.6L Turbo | 2 & 4 | 2.2-3.2 |
| (1) With engine running. (2) See BASIC TESTING article. |
AIRFLOW METER VOLTAGE TEST
BAROMETRIC PRESSURE SENSOR
| Pressure: psi (kPa) | Volts |
|---|
| 12.8 (88) | 3.5 |
| 14.7 (101) | 4 |
| (1) Measure voltage from ECU terminal No. 16 to ground. |
| (1) | Measure voltage from ECU terminal No. 16 to ground. |
BAROMETRIC PRESSURE SENSOR VOLTAGE TEST (1)
COOLANT TEMP SENSOR
| Temperature: °F (°C) | Resistance: Ohms |
|---|
| 32 (0) | 5900 |
| 68 (20) | 2500 |
| 104 (40) | 1100 |
| 176 (80) | 300 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
COOLANT TEMPERATURE SENSOR RESISTANCE TEST (1)
EGR TEMP SENSOR
| Temperature: °F (°C) | Resistance: Ohms |
|---|
| 122 (50) | 60-83 |
| 212 (100) | 11-14 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
EGR TEMPERATURE SENSOR RESISTANCE TEST (1)
INTAKE AIR TEMP SENSOR
| Temperature: °F (°C) | Resistance: Ohms |
|---|
| 32 (0) | 6000 |
| 68 (20) | 2700 |
| 176 (80) | 400 |
| (1) Measure resistance across disconnected sensor terminals. |
| (1) | Measure resistance across disconnected sensor terminals. |
INTAKE AIR TEMPERATURE SENSOR RESISTANCE (1)
OXYGEN SENSOR VOLTAGE
| Condition (2) | Volts |
|---|
| Lean | 0.1 |
| Rich | 0.9 |
| (1) Measure between sensor terminal No. 1 and ground. (2) Warm engine to 190°F (90°C). |
| (1) | Measure between sensor terminal No. 1 and ground. |
| (2) | Warm engine to 190°F (90°C). |
OXYGEN SENSOR VOLTAGE TEST (1)
THROTTLE POSITION SENSOR
| Application | (1) Terminal (Ground-Output) | Resistance Ohms |
|---|
| Carbureted |
| Closed | 8-2 | 500 |
| Open | 8-2 | 3500-6500 |
| PFI |
| Closed | 2-3 | 500 |
| Open | 2-3 | 3500-6500 |
| TBI |
| Closed | 1-2 | 500 |
| Open | 1-2 | 3500-6500 |
| (1) Measure resistance at disconnected sensor terminals. |
| (1) | Measure resistance at disconnected sensor terminals. |
THROTTLE POSITION SENSOR RESISTANCE TEST
TRANSMISSION TEMP SENSOR
| Temperature: °F (°C) | Volts |
|---|
| 176 (80) | 1 |
| 68 (20) | 2 |
| (1) Measure voltage at sensor connector terminals. |
| (1) | Measure voltage at sensor connector terminals. |
TRANSMISSION TEMPERATURE SENSOR VOLTAGE TEST (1)
VEHICLE SPEED SENSOR
| Reed Switch (2) | Volts |
|---|
| On | 1 or less |
| Off | 4.5 or more |
| (1) Measure voltage between ECU terminal No. 28 and ground. (2) Roll vehicle to cycle reed switch on and off. |
| (1) | Measure voltage between ECU terminal No. 28 and ground. |
| (2) | Roll vehicle to cycle reed switch on and off. |
VEHICLE SPEED SENSOR VOLTAGE TEST (1)
