Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 637
FMI: 10

Description: CKP signal Inactive
Troubleshooting:
The Crankshaft Position (CKP) sensor is used to read crankshaft speed and position. The
Electronic Control Module (ECM) uses both the Camshaft Position (CMP) and CKP sensors to
calculate the RPM and timing of the engine.
Probable causes:
1) CKP sensor or circuit fault

Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 639
FMI: 14

Description: J1939 Data Link Error (ECM unable to transmit)
Troubleshooting:
The J1939 datalink is the circuit the Electronic Control Module uses to communicate with the
other onboard computers (ABS, ECU, Transmission ECU, ETC.)
Probable causes:
1) J1939 Data link circuit fault
2) Failed ECM

Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 651
FMI: 4

Description: Injector 1 open coil – short circuit
Troubleshooting:
The Electronic Control Module (ECM) determines when fuel needs to be supplied to injectors
and supplies voltage to the injectors. The voltage causes a needle inside the injector to lift
which uncovers the spray holes, directing fuel into the cylinder.
Probable causes:
Injector 1 open coil circuit short to GND
Injector 1 open coil circuit OPEN

Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 651
FMI: 5

Description: Injector 1 open coil – open circuit
Troubleshooting:
The Electronic Control Module (ECM) determines when fuel needs to be supplied to injectors
and supplies voltage to the injectors. The voltage causes a needle inside the injector to lift
which uncovers the spray holes, directing fuel into the cylinder.
Probable causes:
Injector (1) open coil circuit short to GND
Injector (1) open coil circuit OPEN