Pinpoint Test G : The A/C (Air Conditioning) Is Inoperative: Notes
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. 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
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