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HOMESERVICE MANUALSVOLKSWAGEN2013BEETLE BASE, 2D HATCHBACK, 2.5L ENG VIN X, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 495 (HVAC CONTROL SYSTEM-GENERAL INFORMATION AND DIAGNOSTICS - F250-F550 SUPER DUTY)DIAGNOSIS AND TESTINGCLIMATE CONTROL SYSTEMELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE COLD BOOT PROCESS
2013 Volkswagen Beetle Base, 2D Hatchback, 2.5L Eng VIN X, Standard Trans

Electronic Automatic Temperature Control (EATC) Module Cold Boot Process

2013 Volkswagen Beetle Base, 2D Hatchback, 2.5L Eng VIN X, Standard TransSECTION Electronic Automatic Temperature Control (EATC) Module Cold Boot Process
WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 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.

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the EATC module electrical connectors.
  3. Wait one minute.
  4. Connect the EATC module electrical connectors.
  5. Turn the ignition switch to the ON position.
  6. 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 the INTRODUCTION - GASOLINE article.
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC EATC (On Demand) Self-Test Faults EATC (Continuous) Run-Time Faults Description Action to Take
B2266 024 025 Blend door failure or short GO to PINPOINT TEST A .
B1251 031 N/A A/C in-vehicle temperature sensor open circuit GO to PINPOINT TEST B .
B1253 030 N/A A/C in-vehicle temperature sensor short to ground GO to PINPOINT TEST B .
B1255 041 043 A/C ambient temperature sensor open circuit GO to PINPOINT TEST C .
B1257 040 042 A/C ambient temperature sensor short to ground GO to PINPOINT TEST C .
B1259 N/A N/A A/C solar radiation sensor circuit open GO to PINPOINT TEST D .
B1261 050 052 A/C solar radiation sensor circuit short to ground GO to PINPOINT TEST D .
U1073 N/A - SCP invalid or missing data for engine coolant Refer to the INTRODUCTION - GASOLINE article.
U1341 N/A N/A SCP invalid data for vehicle speed Refer to the INTRODUCTION - GASOLINE article.
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