Pinpoint Test I : The A/C (Air Conditioning) Is Inoperative: Notes
WARNING: This page is about a different car, the 2015 Ford C-Max. However, it is still accessible from the selected car via links, so may be relevant.
The A/C Is Inoperative
Refer to AUTOMATIC CLIMATE CONTROL SYSTEM for schematic and connector information.
Control System Logic. REFER to: Climate Control System - System Operation and Component Description .
Controls and Compressor. REFER to: Climate Control System - System Operation and Component Description .
A/C pressure transducer. REFER to: Climate Control System - System Operation and Component Description .
Evaporator Temperature Sensor. REFER to: Climate Control System - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B11EE:19 | A/C Compressor: Circuit Current Above Threshold | This DTC sets when the ACCM detects excessive voltage on the low voltage circuit. |
| B11EE:41 | A/C Compressor: General Checksum Failure | This DTC sets when there is not communication between the low voltage micro controller and the high voltage motor controller both within the ACCM. |
| B11EE:92 | A/C Compressor: Performance or Incorrect Operation | This DTC sets when the ACCM detects the number of stops due to "software overcurrent" or "start failure" exceeds a specified value. |
Possible Sources
- Wiring, terminals or connectors
- Electric cooling fan
- Active grille shutters
- A/C pressure transducer
- Evaporator temperature sensor
- Ambient air temperature sensor
- ACCM
- HVAC control module
- SOBDMC also known as (TCM)
Visual Inspection and Diagnostic Pre-checks
- Verify BJB fuse 29 (10A) is OK.
- Verify that ambient temperature is greater than 32.0°F (°C).