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

The A/C is Inoperative 

Refer to Wiring Diagrams MANUAL CLIMATE CONTROL SYSTEM for schematic and connector information.

Normal Operation and Fault Conditions 

Refer to A/C Request. REFER to: Climate Control System - System Operation and Component Description 

Possible Sources 

• Fuses
• Wiring, terminals or connectors
• A/C system discharged or low refrigerant charge
• Network concerns
• Intake Air Temperature (IAT) / Mass Air Flow (MAF) sensor
• Evaporator temperature sensor
• A/C pressure transducer
• A/C compressor clutch air gap
• A/C compressor
• 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 fuse 11 (10A) and fuse 38 (7.5A diesel) or fuse 39 (10A gas) are OK.