ELECTRONIC ENGINE CONTROL (EEC-IV)
Note. Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. For sensor testing procedures, see the TESTS W/CODES - EEC-IV (2.5L) article.
BAROMETRIC PRESSURE (BARO) SENSOR
| Barometric Pressure (In. Hg) | (1) Frequency (Hz) |
|---|
| 17.1 | 122.4 |
| 18.3 | 125.5 |
| 19.5 | 128.7 |
| 20.7 | 131.9 |
| 21.8 | 135.1 |
| 23.0 | 138.3 |
| 24.2 | 141.8 |
| 25.4 | 145.4 |
| 26.6 | 148.9 |
| 27.7 | 152.5 |
| 28.9 | 156.1 |
| 30.1 | 159.6 |
| 31.0 | 162.4 |
| (1) Frequency value may vary by 3 percent. |
| (1) | Frequency value may vary by 3 percent. |
BARO SENSOR SPECIFICATIONS
DIFFERENTIAL PRESSURE FEEDBACK EGR (DPFE)
| Pressure (psi) | Vacuum (In. Hg) | (2) Volts |
|---|
| 4.34 | 8.83 | 4.56 |
| 3.25 | 6.62 | 3.54 |
| 2.17 | 4.41 | 2.51 |
| 1.08 | 2.21 | 1.48 |
| 0 | 0 | 0.45 |
| (1) Measure between ground and White/Blue wire. (2) Voltage may vary by 15 percent. |
| (1) | Measure between ground and White/Blue wire. |
| (2) | Voltage may vary by 15 percent. |
DPFE SENSOR SPECIFICATIONS (1)
PRESSURE FEEDBACK EGR (PFE) SENSORS
| Pressure (psi) | Vacuum (In. Hg) | (2) Volts |
|---|
| 1.82 | 3.70 | 4.75 |
| 1.36 | 2.79 | 4.38 |
| 0.91 | 1.85 | 4.00 |
| 0.46 | 0.94 | 3.63 |
| 0 | 0 | 3.25 |
| 2.47 | 5.03 | 1.22 |
| 3.63 | 7.40 | 0.25 |
| (1) Measure between ground and Brown/Light Green wire (2) Voltage may vary by 15 percent. |
| (1) | Measure between ground and Brown/Light Green wire |
| (2) | Voltage may vary by 15 percent. |
PFE SENSOR SPECIFICATIONS (1)
INTAKE AIR TEMPERATURE (IAT) & ENGINE COOLANT TEMPERATURE
| Temperature °F (°C) | (2) Volts | (2) Ohms |
|---|
| 50 (10) | 3.51 | 58,750 |
| 68 (20) | 3.07 | 37,300 |
| 86 (30) | 2.60 | 24,270 |
| 104 (40) | 2.13 | 16,150 |
| 122 (50) | 1.70 | 10,970 |
| 140 (60) | 1.33 | 7700 |
| 158 (70) | 1.02 | 5370 |
| 176 (80) | 0.78 | 3840 |
| 194 (90) | 0.60 | 2800 |
| 212 (100) | 0.46 | 2070 |
| (1) See the TESTS W/CODES - EEC-IV (2.5L) article for terminal identification. (2) Values may vary by 15 percent. |
| (1) | See the TESTS W/CODES - EEC-IV (2.5L) article for terminal identification. |
| (2) | Values may vary by 15 percent. |
IAT & ECT SENSOR SPECIFICATIONS (1)
TRANSMISSION RANGE (TR) SENSOR
| Position | Ohms |
|---|
| P | 3770-4607 |
| R | 1304-1593 |
| N | 660-807 |
| O/D | 361-442 |
| D | 190-232 |
| 1 | 78-95 |
| (1) Measure between White/Green or Red/Black wire and Black/White wire. |
| (1) | Measure between White/Green or Red/Black wire and Black/White wire. |
TR SENSOR SPECIFICATIONS (1)
MASS AIRFLOW (MAF) SENSOR
| Engine Condition (2) | (3) Volts |
|---|
| Idle | 0.6 |
| 20 MPH | 1.1 |
| 40 MPH | 1.7 |
| 60 MPH | 2.1 |
| (1) See the TESTS W/CODES - EEC-IV (2.5L) article for terminal identification. (2) Engine at normal operating temperature. (3) Voltage may vary depending on vehicle load and temp. |
| (1) | See the TESTS W/CODES - EEC-IV (2.5L) article for terminal identification. |
| (2) | Engine at normal operating temperature. |
| (3) | Voltage may vary depending on vehicle load and temp. |
MAF SENSOR SPECIFICATIONS (1)
THROTTLE POSITION (TP) SENSOR
| Throttle Angle (Degrees) | (2) Volts |
|---|
| 0 | 0.50 |
| 13 | 1.21 |
| 26 | 1.82 |
| 39 | 2.43 |
| 52 | 3.03 |
| 65 | 3.65 |
| 78 | 4.26 |
| (1) See the TESTS W/CODES - EEC-IV (2.5L) article for terminal identification. (2) Voltage may vary by 3 percent. |
| (1) | See the TESTS W/CODES - EEC-IV (2.5L) article for terminal identification. |
| (2) | Voltage may vary by 3 percent. |
TP SENSOR SPECIFICATIONS (1)
