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. All voltage tests should be performed with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure.
| Between Terminals | Voltage |
|---|
| 3 & 6 | 2.7-3.2 |
| (1) Measure voltage with engine idling at normal operating temperature. (Scheme 1) |
| (1) | Measure voltage with engine idling at normal operating temperature. (Scheme 1) |
AIRFLOW SENSOR VOLTAGE TEST (1)
Scheme 1
| Temperature °F (°C) | Volts |
|---|
| 32 (0) | 3.4-3.6 |
| 68 (20) | 2.4-2.7 |
| 104 (40) | 1.5-1.8 |
| 176 (80) | .5-.7 |
| (1) Measure between ECM connector B, terminal No. 9 and ground. |
| (1) | Measure between ECM connector B, terminal No. 9 and ground. |
COOLANT TEMPERATURE SENSOR TEST (1)
| Temperature °F (°C) | Ohms |
|---|
| 32 (0) | 5,900 |
| 68 (20) | 2,500 |
| 104 (40) | 1,100 |
| 176 (80) | 300 |
| (1) Measure resistance between sensor terminals. |
| (1) | Measure resistance between sensor terminals. |
COOLANT TEMPERATURE SENSOR RESISTANCE TEST (1)
| Temperature °F (°C) | Ohms |
|---|
| 32 (0) | 6,000 |
| 68 (20) | 2,700 |
| 176 (80) | 400 |
| (1) Measure resistance between terminals No. 2 and 4. (Scheme 1) |
| (1) | Measure resistance between terminals No. 2 and 4. (Scheme 1) |
INTAKE AIR TEMPERATURE SENSOR RESISTANCE TEST (1)
| Throttle Position | Volts |
|---|
| Closed | .4-.7 |
| WOT | 4.5-5.5 |
| (1) Measure between ECM connector B, terminal No. 9 and ground. |
| (1) | Measure between ECM connector B, terminal No. 9 and ground. |
THROTTLE POSITION SENSOR TEST (EXCEL) (1)
| Throttle Position | Ohms |
|---|
| Closed | 500 |
| WOT | 3,500-6,500 |
| (1) On 4-Cylinder models, measure between terminals No. 1 and 2. (Scheme 2) (2) On V6 models, measure between No. 2 and 4. (Scheme 3) |
| (1) | On 4-Cylinder models, measure between terminals No. 1 and 2. (Scheme 2) |
| (2) | On V6 models, measure between No. 2 and 4. (Scheme 3) |
THROTTLE POSITION SENSOR (TPS) RESISTANCE TEST (1) (2)
Scheme 2
Scheme 3
| Application | Volts |
|---|
| Crank Angle Sensor (2) | 1.8-2.5 |
| TDC Signal (3) | .2-1.2 |
| (1) Measure while cranking engine. (Scheme 4) (2) Measure between terminals No. 1 and 2. (3) Measure between terminals No. 1 and 3. |
| (2) | Measure between terminals No. 1 and 2. |
| (3) | Measure between terminals No. 1 and 3. |
CRANK ANGLE SENSOR TEST (1)
Scheme 4
| Condition | Volts |
|---|
| Lean | .1 |
| Rich | .9 |
| (1) 4-Cylinder measure, voltage between sensor terminals. On V6 models, measure voltage between sensor terminals No. 1 and 2 of 4-wire connector. |
| (1) | 4-Cylinder measure, voltage between sensor terminals. On V6 models, measure voltage between sensor terminals No. 1 and 2 of 4-wire connector. |
OXYGEN (O2) SENSOR TEST (1)
Scheme 5
