Checking power supply and ground terminal, engine control module (ECM)

Checking the power supply

Check fuse 11 the integrated relay / fusebox in the passenger compartment. If the fuse is blown, check the circuit after the fuse for a short-circuit to ground according to Short-circuit to ground, permanent faults
Check fuse 13 the integrated relay / fusebox in the engine compartment. If the fuse is blown, check the circuit after the fuse for a short-circuit to ground according to Short-circuit to ground, permanent faults
Check the power supply to terminal 29. The voltage should be approximately battery voltage with the ignition on
Check the power supply to terminal 66. The voltage should be approximately battery voltage for 2 seconds after the ignition is switched on
Check the power supply to terminal 30. The voltage should be approximately battery voltage for 2 seconds after the ignition is switched on
Remedy as necessary.

Checking the ground terminal

Check the ground lead at engine control module (ECM) terminals 3, 28, 33 and 67 for an open-circuit according to Open-circuit, permanent faults
Check the ground terminal on the engine control module (ECM) for contact resistance and oxidation according to Contact resistance and oxidation .

Remedy as necessary

Other information

Fig 1: Identifying Integrated Relay/Fusebox

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Integrated Relay/Fusebox In Passenger Compartment

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected?