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Home >> Volvo >> 2001 >> S80 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 7 Of 11 >> ECM-431D: Leak Diagnostic Unit. Faulty Signal (B5254T2; 2004) >> Fault-tracing >> Checking software

Checking software

HINT: For vehicles of model year 2003-2005, the software in engine control module (ECM) should be checked before fault tracing of the fault relating to the leak from the tank system is carried out. 

Fig 1: Checking Traffic Load On CAN Cables
GLL101053Courtesy of VOLVO CARS OF NORTH AMERICA.

Has the latest software been downloaded to the control module?