Pinpoint Test K : The A/C (Air Conditioning) Is Inoperative: Notes

Refer to Automatic Climate Control System for schematic and connector information.

Normal Operation and Fault Conditions 

A/C Request. Refer to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) - System Operation and Component Description .

Possible Sources 

• Wiring, terminals or connectors
• A/C system discharged or low refrigerant charge
• Network concerns
• A/C pressure transducer
• Evaporator temperature sensor
• Intake Air Temperature (IAT) / Mass Air Flow (MAF) sensor
• A/C compressor clutch air gap
• A/C compressor clutch field coil
• A/C clutch relay
• HVAC control module
• PCM

Visual Inspection and Diagnostic Pre-checks 

• Inspect for loose or corroded PCM and A/C clutch relay connection.
• Make sure BJB fuses 23 (5A) and 27 (15A) are OK.