Checking the signal cable

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.

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Connect a voltmeter between engine cooling fan (FC) relay base terminal #2 and ground.

Fig 2: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying System Relay Base Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read infinite resistance.

OK
Refer to Checking the engine cooling fan (FC) relay
NOT OK
Refer to Checking the signal cable

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Check the cable between engine cooling fan (FC) relay terminal #2 and engine control module (ECM) connector terminal #8 for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

Fig 2: Identifying System Relay Control Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter
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Fig 4: Identifying EMS2000
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification

Check the cable between engine cooling fan (FC) relay base terminal #2 and engine control module (ECM) connector terminal #8. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Remedy as necessary.

Fig 1: Identifying System Relay Control Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying EMS2000

Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification