Pinpoint Test F : B1B71:21, B1B71:22, B1B71:2F: Notes
WARNING: This page is about a different car, the 2017 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Manual Climate Control System for schematic and connector information.
Normal Operation and Fault Conditions
Refer to component description, evaporator temperature sensor. REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1B71:21 | Evaporator Temperature Sensor: Signal Amplitude < Minimum | This DTC sets in continuous memory and on-demand when the BCM senses lower than expected voltage on the sensor feedback circuit, indicating a short to ground. |
| B1B71:22 | Evaporator Temperature Sensor: Signal Amplitude > Maximum | This DTC sets in continuous memory when the BCM senses greater than expected voltage on the sensor feedback circuit, indicating a short to voltage or an open circuit or sensor. |
| B1B71:2F | Evaporator Temperature Sensor: Signal Erratic | This DTC sets when the BCM senses erratic voltages from the evaporator temperature sensor. |
Possible Sources
- Wiring, terminals or connectors
- Evaporator temperature sensor
- BCM