Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 5392, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve Loss of Prime MID 128 PSID 121 ECM SPN 5394, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve MID 128 PSID 89 85 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 7 • Mechanical system not responding properly • Aftertreatment Diesel Exhaust Fluid (DEF) pressure build up failure • MIL illuminated • Yellow electronic malfunction lamp illuminated • No Aftertreatment Diesel Exhaust Fluid (DEF) dosing • Empty DEF tank • DEF filter clogged • DEF inlet pipe leak or blockage • DEF pump assembly FMI 31 • Condition exists • Aftertreatment Diesel Exhaust Fluid (DEF) pressure build up failure • MIL illuminated • Yellow electronic malfunction lamp illuminated • No Aftertreatment Diesel Exhaust Fluid (DEF) dosing • Empty DEF tank • DEF filter clogged • DEF inlet pipe leak or blockage • DEF pump assembly Type of fault: FMI Description: Fault Condition:
Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range - Most severe level • Low side circuit shorted to + • MIL illuminated • Aftertreatment DEF dosing pump assembly FMI 1 • Data valid but below normal operational range - Most severe level • Short to ground • Low side circuit open • MIL illuminated • Aftertreatment DEF dosing pump assembly FMI 3 • Voltage above normal, or shorted to high source • Circuit shorted + • MIL illuminated • Aftertreatment DEF dosing pump assembly FMI 4 • Voltage below normal, or shorted to low source • Circuit shorted – • MIL illuminated • Aftertreatment DEF dosing pump assembly FMI 5 • Current below normal or open circuit • Open circuit • MIL illuminated • Yellow electronic malfunction lamp illuminated • Aftertreatment DEF dosing • Aftertreatment DEF dosing pump assembly FMI 14 • Special instructions • Aftertreatment DEF dosing clogged or hose clogged • MIL illuminated • Yellow electronic malfunction lamp illuminated • Aftertreatment DEF doser clogged • Hose clogged