Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 1322, Engine Misfire for Multiple Cylinders – MID 128 PSID 27 ECM SPN 1659, Engine Coolant System Thermostat – MID 128 PSID 109 ECM SPN 1675, Engine Starter Mode – MID 128 SID 39 50 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 8 • Abnormal frequency or pulse width or period • Cylinder misfires detected in multiple cylinders • MIL illuminated • Rough idle • Engine fuel injectors FMI 31 • Condition exists • Cylinder misfires detected in multiple cylinders • MIL illuminated • Rough idle • Engine fuel injectors Type of fault: FMI Description: Fault Condition: Possible Symptoms:
Possible Cause: FMI 7 • Mechanical system not responding or out of adjustment • Thermostat stuck closed • Possible poor drivability • Coolant thermostat FMI 12 • Bad intelligent device or component • Thermostat is leaking or stuck open • MIL illuminated • Longer engine warm up time • Poor heat in cab • Coolant thermostat Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range - Most severe level • Starter overheating • Engine will not start • Starter is deactivated due to overheating FMI 7 • Mechanical system not responding or out of adjustment • Transmission not in neutral • Engine will not start • Starter is deactivated due to overheating FMI 10 • Abnormal rate of change • Starter gear is stuck, engaged with engine • Engine will not start • Starter is deactivated due to overheating FMI 14 • Special instructions • PTO is engaged or switch on • Engine will not start • Starter is deactivated due to overheating