my air conditioning doesnt work clucth will not engage check fuse its ok.will low feon gas cause this.
Mar 22, 2010 at 10:40 PM
2000 Chevy Venture
2000 CHEVROLET VENTURE
STEPUSA
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Description
Powertrain Control Module (PCM) receives an A/C request signal from Body Control Module (BCM) over Class 2 serial data line. When A/C is requested, PCM provides a ground path to A/C clutch relay control circuit. When relay circuit is grounded, A/C clutch relay is energized. The PCM delays grounding relay circuit for .3 seconds. This allows PCM to adjust engine idle RPM for additional load.
The PCM will disengage A/C compressor clutch if one or more of the following conditions occur:
Throttle angle is greater than 90 percent.
A/C head pressure is greater than 440 psi (31 kg/cm2 ) with A/C refrigerant pressure sensor reading greater than 4.27 volts.
A/C head pressure is less than 35 psi (2.5 kg/cm2 ) with A/C refrigerant pressure sensor reading greater than .40 volts.
Ignition voltage is less than 10.5 volts.
Engine speed is greater than 4300 RPM for 5 seconds or at 5400 RPM for any amount of time.
Engine coolant temperature is greater than 255°F (124°C).
Intake air temperature is less than 41°F (5°C).
Powertrain Control Module (PCM) receives an A/C request signal from Body Control Module (BCM) over Class 2 serial data line. When A/C is requested, PCM provides a ground path to A/C clutch relay control circuit. When relay circuit is grounded, A/C clutch relay is energized. The PCM delays grounding relay circuit for .3 seconds. This allows PCM to adjust engine idle RPM for additional load.
The PCM will disengage A/C compressor clutch if one or more of the following conditions occur:
Throttle angle is greater than 90 percent.
A/C head pressure is greater than 440 psi (31 kg/cm2 ) with A/C refrigerant pressure sensor reading greater than 4.27 volts.
A/C head pressure is less than 35 psi (2.5 kg/cm2 ) with A/C refrigerant pressure sensor reading greater than .40 volts.
Ignition voltage is less than 10.5 volts.
Engine speed is greater than 4300 RPM for 5 seconds or at 5400 RPM for any amount of time.
Engine coolant temperature is greater than 255°F (124°C).
Intake air temperature is less than 41°F (5°C).
Mar 29, 2010 at 7:29 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.