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Home >> Volvo >> 2007 >> V50 Base, 2.4 39 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 7 Of 9 >> ECM-820A: System Relay. Faulty Signal (B5244S4; B5244S7; 2005-2010) >> Faulty Signal (2005-2007) >> Checking The Component And Wiring

Checking The Component And Wiring

Check the cable between engine control module (ECM) terminal #B16 (#C16) and system relay terminal #2. Check for a short-circuit to supply voltage. Check for short-circuit to ground.

Remedy as necessary.

Other information 

Fig 1: Identifying Ohm Meter
GLL101042Courtesy of VOLVO CARS CORPORATION
Fig 2: Identifying Battery
GLL101059Courtesy of VOLVO CARS CORPORATION