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Home >> Volvo >> 2003 >> S80 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 10 Of 11 >> ECM-901A: Engine Control Module (ECM) Communication. Faulty Communication (B6294S; 2000-2001) >> Too-high: signal/signal missing/too low signal. >> Faulty communication >> Verification

Faulty communication: Verification

HINT: After carrying out the repair, check that the fault has been remedied. 

Fig 1: Identifying Ignition ON
GLL101051Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the diagnostic trouble code (DTC) recur?