Checking components and wiring

Fig 1: Identifying Ignition In Off Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connectors

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
  CAUTION:

  Avoid touching the pins in the control module and the corresponding connector on the cable harness. There is a risk of static discharge which could damage the control module. Discharge yourself and tools to be used by holding the tool's metal part and touching a body part on the car just before starting to work.

  If the engine cooling fan (FC) cannot be activated at any speed:

  • Check the fuse, power supply cable and ground lead for the engine cooling fan (FC).
  • Check the connector and wiring between the engine control module (ECM) and engine cooling fan (FC) module. Check for damage. Check for an open circuit. Check for a short circuit.

  If the engine cooling fan (FC) can be activated at one or more speeds:

  • Check the connectors to the engine cooling fan (FC) control module and Engine Control Module (ECM). Check for damage to pins and connections.
  • Also check other connectors and connections that connect cables between Engine Control Module (ECM) and the control module for electric cooling fan.
  • Check the wiring between the engine control module (ECM) and the engine cooling fan (FC) module. Check for damage.

  Remedy as necessary

  Other information: 

  • See Connecting the breakout box
  • For information about signals on 5-cylinder engines, see Signal specification or Signal specification
  • See Engine cooling fan (FC), replacing
  • See the wiring diagram for the cable routing.
  • See Checking wiring and terminals
  Fig 3: Identifying Engine Fan Control Module

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to Verification 

• NO 

  Refer to Replacing the engine cooling fan (FC) control module