Cummins ISX15 CM2250 (2010-12) Fault Code: 3737 PID: SID 115 SPN: 1675 FMI: 31 Engine Starter Mode Overcrank Protection- Condition Exists
Circuit Description
The overcrank protection feature (or starter lockout) is designed to prevent damage to the starter motor during hard start conditions. Excessive cranking of the engine can cause the starter motor to overheat, resulting in permanent damage. When excessive engine cranking is detected, the overcrank protection feature locks out the starter until the starter motor has adequately cooled, and is safe to operate again.
Component Location
The overcrank protection feature is controlled by the ECM, and can not be modified.
Conditions for Running the Diagnostics
This diagnostic runs when the engine is being started.
Conditions for Setting the Fault Codes
The ECM detects that the starter motor has been engaged for a long enough period of time that continued cranking can cause starter damage. This cumulative time includes continuous cranking and/or a series of shorter cranking attempts within a certain time window.
Action Taken When the Fault Code is Active
The starter is locked out and the engine can not be cranked over until the starter motor has adequately cooled.
The ECM will flash the Wait to Start lamp (if equipped) until the starter motor has adequately cooled (up to 150 seconds).
Conditions for Clearing the Fault Code
The fault code status displayed by INSITE? electronic service tool will change to INACTIVE and the Wait To Start lamp will stop flashing immediately after the starter cool down period has expired, which can take up to 150 seconds.
The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the Malfunction Indicator Lamp (MI)L for On-Board Diagnostic (OBD) applications
Shop Talk
This is an information only fault code, and does not indicate an issue with the starter.
Possible Cause:
1) ECM calibration
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