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Volvo All Engines (2004 Emissions) Fault Code: SID 39 FMI 3 Starter Output

Fault Condition: FMI 3 indicates there is a short circuit to voltage in the starter relay control circuit.

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Vehicle Electronic Control Unit (VECU) connector B. Turn the ignition key ON. Measure the voltage between the VECU connector B pin 28 and a good ground. If voltage is present, the control line circuit is
shorted to voltage. Locate the short to voltage, repair the circuit and retest the system. If there is NO voltage present, verify the diagnostic code, the FMI and retest the system. If the FMI 3 is still active, replace the VECU and retest the system.