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Home >> Volvo >> 2008 >> S40 T-5, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Electronic Control Module (ECM) Diagnostic Trouble Codes - 2 Of 3 (644 Body)) >> ECM-5C: Canister Purge (Cp) Valve Signal. Signal Too High. Intermittent Fault (B4204T3; 2004) >> Signal too high. Intermittent fault >> Checking components and wiring

Checking components and wiring

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Check that the resistance in the canister purge (CP) valve between terminals #1 and #2 is approximately 21 Ω at +20 °C.

Check the signal cable between engine control module (ECM) terminal 4 and canister purge (CP) valve terminal #1. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults . Remedy if necessary.

Other information 

Fig 1: Identifying Canister Purge (CP) Valve Terminals
GLL111977Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying EMS2000
GLL111998Courtesy of VOLVO CARS OF NORTH AMERICA.