Checking the wiring

Check the fuse before the circuit. If the fuse is blown, check the circuit for a short-circuit to ground.

Check the power cable between the fuse of the circuit and terminal #1 of the control module cooling fan for open circuit.

Check the signal cable with regard to open circuit.

Take readings between:

Engine Control Module (ECM) terminal #B48 (#B58) and terminal #2 of control module cooling fan.

If no faults are found via the aforementioned fault tracing, replace the control module cooling fan.

Remedy as necessary.

Other information:

To connect the breakout box, see Connecting the breakout box
For information about signals on 5 cylinder engines, see Signal specification
For information about signals on 6 cylinder engines:
- For 6 cylinder engines -2001, see Signal specification
- For 6 cylinder engines 2002-, see Signal specification
- For 6 cylinder engines -2004, see Signal specification
- For 6 cylinder engines 2005-, see Signal specification .
See Checking wiring and terminals .

Fig 1: Identifying Ohm Meter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Engine Cooling Fan (FC) Control Modules

Courtesy of VOLVO CARS OF NORTH AMERICA.