Cummins ISX11.9 CM2250 (2010-12) Fault Code: 2448 PID: 2560 SPN: 111 FMI: 17 Coolant Level- Data Valid But Below Normal Operating Range- Least Severe Level
Circuit Description
The coolant level sensor is a switch and is used to measure the level of the engine coolant in the radiator top tank. The coolant level sensor is immersed in the coolant and returns a different signal voltage when immersed in the coolant versus being out of the coolant. The electronic control module (ECM) monitors the change in the signal voltage to determine the level of the engine coolant.
Component Location
The engine coolant level sensor is typically located in the radiator top tank or surge tank. Refer to the OEM service manual for the location.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is in operation.
Conditions for Setting the Fault Codes
The ECM detects that the coolant level sensor signal voltage is between 1.75 VDC and 3 VDC for more than 30 seconds, indicating low coolant level.
Action Taken When the Fault Code is Active
The ECM flashes the amber CHECK ENGINE light at initial key ON for 30 seconds when low engine coolant level has been detected.
Conditions for Clearing the Fault Code
To validate the repair, start the engine and let it idle for 1 minute.
The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
The ECM will turn off the amber MAINTENANCE lamp after the diagnostic runs and passes.
The Reset All Faults command in INSITE? electronic service tool can be used to clear active and inactive faults.
Shop Talk
This fault code goes active when the coolant level inside the radiator top tank or surge tank drops below the sensor level. Fill the top tank with coolant.
Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.
For intermittent power supply and datalink communication issues with Aftertreatment Components, it is highly recommended that the OEM Power Distribution Center fuses and relays be thoroughly checked for loose, missing or intermittent connections.
Possible Cause:
1) ECM calibration
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