Pinpoint Test U : B1A59:11, B1A59:12: Notes
WARNING: This page is about a different car, the 2015 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Automatic Climate Control System for schematic and connector information.
Normal Operation and Fault Conditions
A 5-volt reference voltage is supplied to the temperature and air distribution door actuators from the HVAC module.
Diagnostic Trouble Code (DTC) Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1A59:11 | Sensor 5 Volt Supply: Circuit Short To Ground | This DTC sets when the HVAC module senses lower than expected voltage on the reference voltage circuit, indicating a short to ground. |
| B1A59:12 | Sensor 5 Volt Supply: Circuit Short To Battery | This DTC sets when the HVAC module senses greater than expected voltage on the reference voltage circuit, indicating a short to voltage or an open circuit or actuator. |
Possible Sources
- Wiring, terminals or connectors
- HVAC module
Visual Inspection and Diagnostic Pre-checks
Inspect loose or corroded HVAC module connections.