Engine Controls - Sensor Operating Range Charts 3.0L: 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:
Perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. To identify ECU terminals, see wiring diagram in WIRING DIAGRAMS
article. CAMSHAFT POSITION SENSOR VOLTAGE TEST
| Application |
Wire Color (1-Degree Signal) |
Wire Color( 120/180-Degree Signal) |
| Quest |
Red/Blue |
Red/White |
CLOSED THROTTLE POSITION SWITCH CONTINUITY
| Application |
Wire Colors |
| Quest |
Red/Yellow & Brown/Yellow |
ENGINE (COOLANT) TEMPERATURE SENSOR RESISTANCE
| Temperature - °F (°C) |
Ohms |
| 68 (20) |
2100-2900 |
| 122 (50) |
680-1000 |
| 176 (80) |
300-330 |
| 194 (90) |
236-260 |
EXHAUST GAS TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) |
Ohms |
| 212 (100) |
76,770-93,830 |
INHIBITOR SWITCH CONTINUITY
| Lever Position |
8-Pin Connector Terminals No. |
2-Pin Connector Terminals No. |
| "P" |
3 & 4 |
1 & 2 |
| "R" |
3 & 5 |
N/A |
| "N" |
3 & 6 |
1 & 2 |
| "D" |
3 & 7 |
N/A |
| "2" |
3 & 8 |
N/A |
| "1" |
3 & 9 |
N/A |
KNOCK (DETONATION) SENSOR RESISTANCE @ 77°F (25°C)
| Application |
Ohms |
| Quest |
Continuity To Ground |
MASS AIRFLOW SENSOR VOLTAGE TEST
| Application |
Volts
With KOEO |
Volts At Idle |
| Quest |
Less Than 0.5 |
1.0-1.7 |
POWER STEERING OIL PRESSURE SWITCH
| Condition |
Continuity |
| Steering Unloaded (Not Turning Steering Wheel) |
No |
| Steering Loaded (Turning Steering Wheel) |
Yes |
THROTTLE POSITION SENSOR RESISTANCE TEST
| Application |
Wire Colors |
k/Ohms |
| Quest |
White/Black & Red |
1.0-9.0 |
VEHICLE SPEED SENSOR
| Application |
AC Voltage |
| Quest |
0.5 |