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Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 3 Of 3 >> ECM-A3: System Relay Output Signal Too Low. Intermittent Fault (B4204T2 CVVT; 2000) >> Signal too low. Intermittent fault >> Checking components and wiring

Checking components and wiring

Check the signal cable between engine control module (ECM) terminal #66 and system relay terminal 3 for an intermittent short-circuit to ground and remedy according to Short-circuit to ground, intermittent faults and for an intermittent open-circuit according to Open-circuit, intermittent faults .

Other information 

Fig 1: Identifying EMS2000
GLL111998Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying System Relay Base Connector Terminals
GLL114196Courtesy of VOLVO CARS OF NORTH AMERICA.