Electronic Automatic Temperature Control (EATC) Module Cold Boot Process
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of the cold boot process is to allow the EATC module to reinitialize and calibrate the actuators. To carry out the cold boot process, follow the steps below.
- Turn the ignition switch to the OFF position.
- Disconnect the EATC module electrical connectors.
- Wait one minute.
- Inspect module connectors for:
- corrosion.
- pushed-out connector pins.
- incorrectly seated connectors.
- Connect the EATC module electrical connectors.
- Turn the ignition switch to the ON position.
- Select any position except OFF on the EATC module.
The EATC module will now initialize and calibrate the actuators. Calibration of the actuators will take approximately 30 seconds.
NOTE:
Some PCM DTCs may inhibit air conditioning (A/C) operation. If any PCM DTCs are retrieved, diagnose those first. Refer to INTRODUCTION -- DIESEL ENGINES
or INTRODUCTION -- GASOLINE ENGINES
article.
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX
| DTC | Description | Action to Take |
|---|---|---|
| B2266 | Blend door failure or short | Go to Pinpoint Test A . |
| B1251 | A/C in-vehicle temperature sensor open circuit | Go to Pinpoint Test B . |
| B1253 | A/C in-vehicle temperature sensor short to ground | Go to Pinpoint Test B . |
| B1255 | A/C ambient temperature sensor open circuit | Go to Pinpoint Test C . |
| B1257 | A/C ambient temperature sensor short to ground | Go to Pinpoint Test C . |
| B1259 | A/C solar radiation sensor circuit open | Go to Pinpoint Test D . |
| B1261 | A/C solar radiation sensor circuit short to ground | Go to Pinpoint Test D . |
| B2268 | Steering wheel climate control circuit open | Go to Pinpoint Test R . |
| B2269 | Steering wheel climate control circuit short to ground | Go to Pinpoint Test R . |
| U1073 | SCP invalid or missing data for engine coolant | Refer to INTRODUCTION -- DIESEL ENGINES or INTRODUCTION -- GASOLINE ENGINES article. |
| U1341 | SCP invalid data for vehicle speed | Refer to INTRODUCTION -- DIESEL ENGINES or INTRODUCTION -- GASOLINE ENGINES article. |