Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 1136, Engine Control Module (ECM) Temperature MID 128 PPID 55 ECM SPN 1198, Anti–theft Random Number – MID 128 PID 224 48 Type of fault FMI Description: Fault Condition: Possible Symptoms: Possible Cause FMI 4 • Voltage below normal, or shorted to low source • Short to ground on the metering circuit • N/A • Engine Control Module (ECM) FMI 5 • Current below normal or open circuit • Short to battery in the metering circuit • Open in the metering circuit • Open circuit in the ground circuit • N/A • Engine Control Module (ECM) Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 2 • Data erratic, intermittent or incorrect • Engine Control Module and Instrument Control Module security codes do not match • Yellow electronic malfunction lamp illuminated • Can start engine • Security system failure FMI 12 • Bad intelligent device or component • Security system not installed • Yellow electronic malfunction lamp illuminated • Can start engine • Security system failure