Fault-Tracing Information
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
Condition
- No diagnostic trouble codes (DTCs) stored in the climate control system or in the engine management system.
- The fault is permanent.
HINT: Certain electrical fault in air conditioning (A/C) system are diagnosed by the engine control module (ECM) and diagnostic trouble codes (DTCs) can be stored there.
Possible Source
- Defective drive belt.
- Pipes and components not secured.
- Incorrect oil level.
- Refrigerant leakage.
- Defective compressor/magnetic clutch.
- Defective pressure switch (Pressostat).
HINT: The air conditioning (A/C) relay, air conditioning (A/C) compressor, air conditioning (A/C) pressure switch and pressure switch (low pressure sensor) are regulated by or electrically connected to the engine control module (ECM). This means that fault-tracing these electrical circuits is not carried out in this test.
Fault symptom[s]
- No cooling from A/C system.
- A/C compressor does not start, or runs sporadically