Informs ECM when A/C system is on. ECM responds by increasing idle speed to improve idling and reduce emissions. During heavy engine load, ECM will also open A/C clutch relay to disengage A/C clutch.
Contents
Wiring diagrams Section: Theory & Operation All sections- Abbreviations
- Accessory Drive Belts
- Adjustments
- Airbag
- Antenna Systems
- Anti-Lock/traction Control
- Application
- Automatic Trans
- Auxiliary Emission Control Systems
- Axle Shafts
- Basic Trouble Shooting
- Brakes
- Cabin Air Filter
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Communication Devices
- Computer Relearn
- Cooling System (Mechanical)
- Cruise Control Systems
- Diagnostic Connector Locations
- Differentials & Drive Axles
- Door Locks & Anti-Theft Systems
- Drive Cycles
- Driveline/axles
- Driveshaft & Universal Joints
- DTC Index
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Performance
- Entertainment Systems
- Exterior Body Panels
- Exterior Lights
- Fuel System
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- Heated Glass/defoggers
- Hoist/jack
- Identification
- Interior/illumination Lights
- Lubrication System
- Manual & Power Steering
- Manual HVAC System
- Manual Trans
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Mode 6
- Oem General Information
- Parking Brake System
- Passive Restraints
- Pin Voltage Charts
- Removal & Installation
- Restraints
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column Switches
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Timing Belt
- Traction Control Disable
- Transfer Case
- Transmission
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring Diagrams - Engine Performance