Workshop Manuals Factory service & repair Aston Martin
Aston Martin DB9 Factory Workshop Manual (Issue 2, 2005)13 · 12 Climate control
13 · Heating & A/C

Removal (page 4 of 5)

Make
Aston Martin
Model
DB9 Factory Workshop Manual
Year
Issue 2, 2005
Section
Air Conditioning (A/C) System
12 Climate controlRemoval · page 4 of 5
Symptom(6) Description Possible Cause
Air from vents not cold enough. Magnetic clutch operates but A/C system malfunctions.
  • Drive belt fault
  • Fault in blower unit or condenser
  • Fault in Receiver / Drier or expansion valve (valve closes too much)
  • Fault in refrigerant lines
  • A/C compressor system fault, insufficient compressor oil
  • Over filling of compressor oil, fault in expansion valve or A/C unit air mix link system
Shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.
Symptom(7) Description Possible Cause
No cool air. Magnetic clutch does not operate.
  • Fault in PCM A/C cut control system
  • Fault in A/C Module
  • Fault in refrigerant pressure switch
  • Fault in PCM (A/C signal)
  • Fault in PCM (IG1 signal)
  • Fault in A/C compressor
  • Fault in A/C relay
  • Fault in Evaporator Temperature Sensor
Shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.
Symptom(8) Description Possible Cause
Noise while operating A/C system. Noise from magnetic clutch, A/C compressor, hose or refrigerant line.
  • Magnetic clutch operation noise
  • A/C compressor slippage noise
  • Hose or refrigerant line interference noise

Parts & tools for this job For 2005 Aston Martin DB9

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