Home >> Volvo >> 2008 >> S40 T-5, FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) Diagnostic Trouble Codes - 1 Of 2 (544 Body) >> TCM-0A31: Control Module Communication. Signal Missing From Engine Control Module (ECM) (Aw50/51 AWD; 2005-10) >> Fault-Tracing Information