Checking power supply and ground terminals

Check the fuse for the control module for four wheel drive (Active on Demand Coupling) in the integrated relay/fusebox in the engine compartment.

If the fuse is blown, fault trace the circuit between control module terminal #1 and the fuse. Check for a short-circuit to supply voltage. Check for a short-circuit to ground.

If the fuse is intact, check the cable between control module terminal #1 and the fuse. Check for an open-circuit.

Check the cable between control module terminal #2 and ground. Check for contact resistance. Check for an open-circuit. Check for a short-circuit to supply voltage.

Check the ground terminal connection. Check for contact resistance and oxidation.

Remedy as necessary.

Other information 

• See Contents .

Fig 2: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.