Engine Controls - Sensor Operating Range Charts: 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:
Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
NOTE:
For testing of sensors not listed, see appropriate Diagnostic Trouble Code (DTC) test in appropriate SELF-DIAGNOSTICS article and/or appropriate SYSTEM & COMPONENT TESTING article.
BRAKE LIGHT SWITCH
| Pedal Position | Ohms | ||
|---|---|---|---|
| Pressed | |||
| Measure Between Terminals No. | |||
| 1 & 2 | Infinity | ||
| 3 & 4 | Continuity | ||
| Released | |||
| Measure Between Terminals No. | |||
| 1 & 2 | Continuity | ||
| 3 & 4 | Infinity | ||
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature | Ohms |
|---|---|
| 68°F (20°C) | 2200-3000 |
| 86°F (30°C) | 1500-2000 |
| 176°F (80°C) | 275-375 |
| 212°F (100°C) | 150-240 |
FUEL INJECTOR RESISTANCE
| Application (1) | Ohms | ||||
|---|---|---|---|---|---|
| 1.8L | (2) 12-13 | ||||
| 2.7L | (2) 13.5-15.5 | ||||
| 2.8L | (2) 13.5-15.5 | ||||
| 4.2L | (2) 13-16 | ||||
|
|||||
HEATED OXYGEN SENSOR RESISTANCE
| Application | Ohms | ||
|---|---|---|---|
| 1.8L, 2.7L & 2.8L | |||
| Measure Between Terminals No. | |||
| 1 & 2 | 6.4-47.5 | ||
| 4.2L | |||
| Measure Between Terminals No. | |||
| 1 & 2 | 0.0-0.9 | ||
HEATED OXYGEN SENSOR VOLTAGE
| Condition | Volts |
|---|---|
| Lean | 0.0-0.3 |
| Rich | 0.7-1.0 |
INTAKE AIR TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) | (1) K/Ohms | ||
|---|---|---|---|
| - 20 | 13.8 | ||
| 0 | 5.5 | ||
| 20 | 2.4 | ||
| 40 | 1.1 | ||
| 60 | .6 | ||
|
|||
LEAK DETECTION PUMP
| Terminals No. | Ohms |
|---|---|
| 1 & 3 | 640-720 |
| 2 & 3 | 17.5-27.5 |
VARIOUS SENSORS, SOLENOIDS & VALVES
| Application | Ohms | |
|---|---|---|
| Camshaft Adjustment Solenoid | 10-18 | |
| Charge Air Pressure Sensor | 22-30 | |
| Engine Speed Sensor (1.8L, 2.7L & 2.8L) | ||
| 1 & 2 | Infinity | |
| 1 & 3 | Infinity | |
| 2 & 3 | 730-1000 | |
| Engine Speed Sensor (4.2L) | ||
| 1 & 2 | Infinity | |
| 1 & 3 | Infinity | |
| 2 & 3 | 450-1000 | |
| Evaporative Emissions Canister Purge Regulator Valve | 22-30 | |
| Intake Manifold Change Over Valve | 25-35 | |
| Knock Sensor | ||
| 1 & 2 | Infinity | |
| 1 & 3 | Infinity | |
| 2 & 3 | Infinity | |
| Secondary Air Injection Solenoid | 27-30 | |
| Turbocharger Recirculating Valve | 27-30 | |
| Wastegate By-Pass Regulator Valve | 25-35 | |