Checking Components And Wiring

Check the power cable with regard to open circuit.

Take readings between:

• Engine Control Module (ECM) #B3 (#C3) and system relay.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX
• see SIGNAL SPECIFICATION
• see CHECKING WIRING AND TERMINALS

Fig 1: Identifying Main Relay

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to INFORMATION