Electronic Automatic Temperature Control (EATC) Module DTC Chart
WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Some PCM DTCs may inhibit A/C operation. If any PCM DTCs are retrieved, diagnose those first. Refer to the Introduction - Gasoline Engines
article.
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE DTC CHART
| DTC | Description | Action to Take |
|---|---|---|
| B1251 | Air Temperature Internal Sensor Circuit Open | Go to Pinpoint Test A . |
| B1253 | Air Temperature Internal Sensor Circuit Short to Ground | Go to Pinpoint Test A . |
| B2783 | Interior Humidity Sensor to DATCa Short Circuit | Go to Pinpoint Test B . |
| B2784 | Interior Humidity Sensor to DATCa Open Circuit | Go to Pinpoint Test B . |
| B1255 | Air Temperature External Sensor Circuit Open | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B1257 | Air Temperature External Sensor Circuit Short to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B129B | Driver Blend Door Actuator, Drive Circuit(s) Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B129C | Driver Blend Door Actuator, Feedback Circuit Open or Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B129D | Driver Blend Door Actuator, Feedback Circuit Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B129F | Passenger Blend Door Actuator, Drive Circuit(s) Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A0 | Passenger Blend Door Actuator, Feedback Circuit Open or Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A1 | Passenger Blend Door Actuator, Feedback Circuit Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A2 | Passenger Blend Door Actuator, Slow or Door Obstructed | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A4 | Mode Door Actuator, Drive Circuit(s) Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A5 | Mode Door Actuator, Feedback Circuit Open or Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A6 | Mode Door Actuator, Feedback Circuit Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A7 | Mode Door Actuator, Slow or Door Obstructed | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12A9 | Recirc Door Actuator, Drive Circuit(s) Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12AF | Front Blower Motor Relay Drive Circuit Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12B0 | Front Blower Motor Relay Drive Circuit Open or Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12B1 | Front Blower Motor PWM Drive Circuit Shorted to Battery Voltage | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12B2 | Front Blower Motor PWM Drive Circuit Open or Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12B8 | Driver Blend Door Actuator, Slow or Door Obstructed | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B12B9 | Vref (5V) Drive Circuit Shorted to Battery Voltage | REPAIR circuit LH111 (BN/WH) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. |
| B12BA | Vref (5V) Drive Circuit Shorted to Ground | REPAIR circuit LH111 (BN/WH) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. |
| B1342 | EATC Is Faulted | INSTALL a new EATC module. REFER to CLIMATE CONTROL article. |
| B1676 | Battery Voltage Out of Range | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B2426 | Passenger Solar Radiation Sensor Circuit Open | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B2427 | Passenger Solar Radiation Sensor Circuit Short to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B2477 | Module Configuration Failure | INSTALL a new EMTC/EATC module. REFER to CLIMATE CONTROL article. |
| B2795 | Driver Solar Radiation Sensor Circuit Short to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B2796 | Driver Solar Radiation Sensor Circuit Open | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B2826 | Front Evaporator Temp Sensor Circuit Failure | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B2827 | Front Evaporator Temp Sensor Short to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B297B | Blend Door Actuator, Drive Circuit(s) Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B297C | Driver Blend Door Actuator, Drive Circuit(s) Open | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B297D | Driver Blend Door Actuator, Drive Circuit(s) Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B297E | Passenger Blend Door Actuator, Drive Circuit(s) Open | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B297F | Passenger Blend Door Actuator, Drive Circuit(s) Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B298A | Mode Door Actuator, Drive Circuit(s) Open | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B298B | Mode Door Actuator, Drive Circuit(s) Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B298C | Recirc Door Actuator, Drive Circuit(s) Open | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| B298D | Recirc Door Actuator, Drive Circuit(s) Shorted to Ground | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| U0140 | Lost Communication With Body Control Module (GEM) | CLEAR The DTCs. REPEAT the self-test. If the DTC returns, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the lost communication with the GEM. |
| U0300 | Internal Control Module Software Incompatibility | INSTALL a new EMTC/EATC module. REFER to CLIMATE CONTROL article. |
| U2050 | No Application Present | INSTALL a new EMTC/EATC module. REFER to CLIMATE CONTROL article. |
| U2051 | One or More Calibration Files Missing/Corrupt | INSTALL a new EMTC/EATC module. REFER to CLIMATE CONTROL article. |
| All Other DTCs | - | REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES article. |
a Dual automatic temperature control
NOTE:
The airflow blend door is also referred to as the air inlet mode door.
TRACTION BATTERY CONTROL MODULE (TBCM) DTC CHART
| DTC | Description | Action |
|---|---|---|
| B1239 | Airflow Blend Door Driver Circuit Failure | Go to Pinpoint Test C . |
| B2950 | Air Conditioning System Fault | Go to Pinpoint Test D . |
| P0535 | A/C Evaporator Temperature Sensor Circuit Failure | Go to Pinpoint Test D . |
| P0A7E | Hybrid Battery Pack Over Temperature | If any other related DTCs are present, DIAGNOSE those DTCs first. If no other DTCs are present, TEST the base A/C system. If the base A/C system is OK, REFER to HIGH VOLTAGE TRACTION BATTERY article. If the base A/C system does not operate correctly, REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| P0A81 | Hybrid Battery Pack Cooling Fan 1 Control Circuit Failure | REFER to HIGH VOLTAGE TRACTION BATTERY article. |
| P0A96 | Hybrid Battery Pack Cooling Fan 2 Control Circuit Failure | REFER to HIGH VOLTAGE TRACTION BATTERY article. |
| P0A9B | Hybrid Battery Temperature Sensor Circuit Failure | REFER to HIGH VOLTAGE TRACTION BATTERY article. |
| P2612 | A/C Refrigerant Distribution Valve (Battery Zone) Control Circuit Low | Go to Pinpoint Test E . |
| P2613 | A/C Refrigerant Distribution Valve (Battery Zone) Control Circuit High | Go to Pinpoint Test E . |
| All Other DTCs | - | REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES article. |