Home >> Volvo >> 2003 >> V70 Base, 2.5 59 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes (DTC) - 8 Of 14 >> ECM-6000: Air Conditioning (A/C) Relay Signal, Signal Missing, Permanent Fault (B5254T4; 2004) >> Signal missing, permanent fault