Air Conditioning (A/C) Request Circuit Diagnosis. GMC Truck Savana 1999

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1999 🢒 Savana 🢒 Engine 🢒 Engine Controls - 6.5L (L65) 🢒 Air Conditioning (A/C) Request Circuit Diagnosis

Refer to

Cell 22: A/C Controls

Engine Controls Components
Information Sensors/Switches Description
Cell 22: 4L80-E Switch and ISS Controls
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Power Distribution Schematics
Power Distribution Schematics
Fuse Block Schematics
Ground Distribution Schematics
Ground Distribution Schematics
.

Circuit Description

Turning ON the air conditioning supplies ignition voltage to the A/C compressor clutch and to the PCM to increase and maintain idle speed.

The PCM does not control the A/C compressor clutch. Therefore, if the A/C system does not function, refer to CCOT A/C System Diagnosis in Heating, Ventilation, and Air Conditioning for diagnosis of the system.