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Home >> Volvo >> 2008 >> S40 T-5, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Electronic Control Module (ECM) Diagnostic Trouble Codes - 3 Of 3 (644 Body)) >> ECM-87: Engine Cooling Fan (FC) High-Speed. Signal Too Low. Permanent Fault (B4204T3; 2004) >> Signal too low. Permanent fault >> Checking the engine cooling fan (FC) relay

Checking the engine cooling fan (FC) relay

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.

Connect an ohmmeter between engine cooling fan (FC) relay terminals #1 and #2 (relay side).

Fig 1: Identifying System Relay Control Connector Terminals
GLL114146Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approximately 75 Ω at +20 °C. 

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