Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 679
FMI: 5
Description: IPR open load / circuit
Troubleshooting:
The Injection Pressure Regulator valve regulates oil pressure in the high pressure injection
control pressure system. The Electronic Control Module (ECM) uses the Injection Control
Pressure (ICP) sensor to monitor adjust the IPR valve duty cycle to match engine
requirements.
Probable causes:
1) IPR valve electrical connector disconnected
2) Open circuit to IPR valve power circuit
3) IPR circuit connector fretting
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 729
FMI: 3
Description: IAHC short to PWR
Troubleshooting:
The Intake Air Heater Control (IAHC) warms the incoming air supply prior to cranking to aid
cold engine starting during warm-up. The IAH system also helps load the engine during a
Diesel Particulate Filter (DPF) regeneration.
Probable causes:
1) Intake Air Heater Control (IAHC) relay control short to PWR
2) Failed relay
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 729
FMI: 4
Description: IAHC short to GND
Troubleshooting:
The Intake Air Heater Control (IAHC) warms the incoming air supply prior to cranking to aid
cold engine starting during warm-up. The IAH system also helps load the engine during a
Diesel Particulate Filter (DPF) regeneration.
Probable causes:
1) IAHC short to GND
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 729
FMI: 5
Description: IAHC open load / circuit
Troubleshooting:
The Intake Air Heater Control (IAHC) warms the incoming air supply prior to cranking to aid
cold engine starting during warm-up. The IAH system also helps load the engine during a
Diesel Particulate Filter (DPF) regeneration.
Probable causes:
1) IAHC circuit open