Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 626, Intake Air Heater (IAH) Relay – MID 128 PID 45 ECM SPN 628, Program Memory – MID 128 SID 240 32 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 3 • Voltage above normal, or shorted to high source • Short Circuit +, Measuring line • Preheat relay not activated • White smoke for cold start • Start problems in cold climate • Preheat relay solenoid shorted FMI 4 • Voltage below normal, or shorted to low source • Short Circuit -, Measuring line • Red engine shutdown lamp illuminated (13L engine CXU, CHU and GU only) • Yellow electronic malfunction lamp illuminated • Induction air is hot • Preheat relay is impossible to turn off • Faulty harness FMI 5 • Current below normal or open circuit • Open Circuit • Preheat relay not activated • White smoke for cold start • Start problems in cold climate • Faulty Preheat relay • Faulty harness Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 2 • Data erratic, intermittent or incorrect • Check sum error • Red engine shutdown lamp illuminated • Engine will not start • Engine Control Module (ECM) software FMI 11 • Root cause not known • Bad software configuration • MIL illuminated • Engine will not start • Engine Control Module (ECM) software