Home >> Volvo >> 2012 >> C70 >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) - Diagnostic Trouble Codes - 2 Of 2 >> TCM-0A31: Control Module Communication. Signal Missing From Engine Control Module (ECM) (Aw55-50/51SN; 2006-2013) >> Fault-Tracing Information