Checking The Power Supply And Ground, Electrical Power Steering Module (EPS)

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS CORPORATION

• Ignition off.

  Check that the following fuses are intact:

  • Main fuse by battery
  • The fuse for the electric power steering module (EPS) in the engine compartment fusebox
  • The fuse for the electric power steering module (EPS) in the central electronic module (CEM).

  Check the power supply cable from the engine compartment fusebox to the electric power steering module (EPS). Check for a short-circuit to ground. Check for an open-circuit.

  Check the cable between the ground terminal and the electric power steering module (EPS). Check for an open-circuit. Check for a short-circuit to supply voltage.

  Check the ground terminal for the electric power steering module (EPS). Check for contact resistance. Check for oxidation.

  Other information 

  • To access the electric power steering module (EPS), see POWER STEERING MODULE (PSC)
  • see CHECKING WIRING AND TERMINALS
  Fig 2: Identifying Ohms Display

  Courtesy of VOLVO CARS CORPORATION
  Fig 3: Identifying Electrical Power Steering Module (EPS)

  Courtesy of VOLVO CARS CORPORATION

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to CHECKING COMMUNICATION WITH THE ELECTRICAL POWER STEERING MODULE (EPS)