Pinpoint Test G : The A/C (Air Conditioning) Is Inoperative: Notes
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. 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.
Normal Operation and Fault Conditions
Control System Logic REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P145B | A/C Demand Not Activated During Self Test | This DTC sets when the PCM does not sense an A/C request during a PCM self-test. |
Possible Sources
- Wiring, terminals or connectors
- A/C system discharged or low refrigerant charge
- Network concerns
- A/C pressure transducer
- Evaporator temperature sensor
- Electric cooling fan
- Intake Air Temperature (IAT) / Mass Air Flow (MAF) sensor
- Active grille shutters (if equipped)
- A/C compressor clutch air gap
- A/C compressor clutch field coil
- A/C clutch relay
- FCIM
- PCM
Visual Inspection and Diagnostic Pre-checks
- Inspect BJB fuses 3 (20A) and 16 (10A).
- Inspect for loose or corroded PCM and A/C clutch relay connection