PINPOINT TEST L: Engine Oil Temperature (EOT) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Be aware of moving vehicle components and heat. Failure to follow these instructions may result in personal injury.
This pinpoint test is intended to diagnose the following:
- EOT sensor (12A648)
- harness circuits: EOT and SIGRTN
- powertrain control module (PCM) (12A650)
TEMPERATURE VS. RESISTANCE VALUES (APPROXIMATE)
| °C | °F | Ohms |
|---|---|---|
| 100 | 212 | 2,080 |
| 90 | 194 | 2,083 |
| 90 | 176 | 2,836 |
| 70 | 158 | 5,337 |
| 60 | 140 | 7,556 |
| 50 | 122 | 10,908 |
| 45 | 113 | 13,216 |
| 40 | 104 | 16,092 |
| 35 | 95 | 19,696 |
| 30 | 86 | 24,329 |
| 25 | 77 | 30,000 |
| 20 | 68 | 37,352 |
| 15 | 59 | 46,797 |
| 10 | 50 | 59,016 |
| 5 | 41 | 79,940 |
| 0 | 32 | 95,851 |
| -5 | 23 | 124,485 |
| -10 | 14 | 160,313 |
| -15 | 5 | 209,816 |
| -20 | -4 | 276,959 |
| -30 | -22 | 496,051 |
| -40 | -40 | 925,021 |
| Pin | Circuit |
|---|---|
| 1 | SIGRTN (Signal Return) |
| 2 | EOT (Engine Oil Temperature) |
| Pin | Circuit |
|---|---|
| E44 | EOT (Engine Oil Temperature) |
| E25 | SIGRTN (Signal Return) |