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Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control Module (ECM) Diagnostic Trouble Codes - 6 Of 11 >> ECM-4000 Canister Purge (Cp) Valve. Signal Missing. Intermittent Fault (B5254T2; 2004) >> Signal missing. Intermittent fault >> Checking wiring and connectors

Checking wiring and connectors

Check the evaporative emission system (EVAP) valve connector. Check for contact resistance and oxidation. Check for loose connections.

Check the signal cable between control module terminal #A9 (#A9) and evaporative emission system (EVAP) valve terminal 2. Check the power supply between system relay terminal 3 and evaporative emission system (EVAP) valve terminal 1. Check for an intermittent open-circuit.

Other information: 

Fig 1: Identifying Evaporative Emission System (EVAP) Valve Connector Terminals
GLL104075Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying Canister Purge (CP) Valve
GLL100939Courtesy of VOLVO CARS OF NORTH AMERICA.