INTRODUCTION
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a diagnostic trouble code, but 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-megohm input impedance.
| PCM Terminal (1) | (2) Voltage |
|---|
| SGT Signal | 5 (4 pulses/rev) |
| SGC Signal (1.5L California) | 5 (1 pulses/rev) |
| (1) See PIN VOLTAGE CHARTS article for terminal identification. (2) Rotate distributor drive by hand while measuring output voltage. |
| (1) | See PIN VOLTAGE CHARTS article for terminal identification. |
| (2) | Rotate distributor drive by hand while measuring output voltage. |
CAMSHAFT POSITION (CMP) SENSOR VOLTAGE
| Terminals (1) | Temperature | Ohms |
|---|
| "A" & "B" | 68°F (20°C) | 500-600 |
| (1) See appropriate SYSTEM & COMPONENT TESTING article for terminal identification. |
| (1) | See appropriate SYSTEM & COMPONENT TESTING article for terminal identification. |
CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE
| Temperature | Ohms |
|---|
| 68°F (20°C) | 2200-2700 |
| 176°F (80°C) | 300-400 |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Vacuum | Voltage |
|---|
| 26.0 in. Hg | 0.3 |
| 18.1 in. Hg | 1.6 |
| 1.9 in. Hg | 4.4 |
| Vacuum | Voltage |
|---|
| 0 in. Hg | 0.8 |
| 5.04 in. Hg | 4.9 |
EGR VALVE POSITION SENSOR VOLTAGE
| Vacuum | Voltage |
|---|
| 0 in. Hg | 2.5 |
| 2.0 in. Hg | 0.5 |
FUEL TANK PRESSURE SENSOR VOLTAGE
| Operating Condition | Volts |
|---|
| Acceleration | 0.5-1.0 |
| Deceleration | 0.0-0.5 |
| Temperature | (1) Ohms |
|---|
| 68°F (20°C) | 2200-2700 |
| (1) Measure between mass airflow sensor terminals "C" and "D". See appropriate SYSTEM & COMPONENT TESTING article for terminal identification. |
| (1) | Measure between mass airflow sensor terminals "C" and "D". See appropriate SYSTEM & COMPONENT TESTING article for terminal identification. |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Terminal (1) | Ignition On Volts | Engine Running Volts |
|---|
| "A" (Power Supply) | 12.0 | 12.0 |
| "B" (Signal) | 0.5-1.0 | 1.0-2.0 |
| "D" (Ground) | 0 | 0 |
| "E" (Ground) | 0 | 0 |
| (1) See appropriate SYSTEM & COMPONENT TESTING article for terminal identification. |
| (1) | See appropriate SYSTEM & COMPONENT TESTING article for terminal identification. |
MASS AIRFLOW (MAF) SENSOR VOLTAGE
| ECM/PCM Wire Color | Closed Throttle Volts | Wide Open Throttle Volts |
|---|
| Blue/Yellow (3F) (1) | 0.5-0.6 | 2.8-4.5 |
| (1) ECM/PCM terminal pin No. in parentheses. |
| (1) | ECM/PCM terminal pin No. in parentheses. |
