Cummins ISX11.9 CM2250 (2010-12) Fault Code: 584 PID: SID 39 SPN: 677 FMI: 3 Starter Relay Driver Circuit- Voltage Above Normal or Shorted to High Source
Circuit Description
The starter lockout relay is controlled by the ECM through the starter lockout relay signal circuit. The relay prevents the starter from being engaged when the engine is running. The relay return circuit is dependent on OEM wiring. It can be wired back to the ECM on some vehicles, or wired to chassis or block ground on others. Consult the OEM wiring diagram for return circuit details. The starter lockout relay circuit utilizes a pulse width modulated (PWM) signal. A PWM signal is a pulsed voltage signal between 0-VDC and system voltage. The frequency of the pulsed voltage signal is dependent on the application requirement.
Component Location
The starter lockout relay is installed by the vehicle OEM. Refer to the OEM service manual for component location.
Conditions for Running the Diagnostics
This diagnostic runs when the keyswitch is in the ON position and when the PWM device is being energized or de-energized. In some cases the diagnostic can also run at some fixed intervals.
Conditions for Setting the Fault Codes
The starter lockout relay circuit PWM signal is not detected to be system voltage when the PWM signal is turned on.
Action Taken When the Fault Code is Active
The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
The Starter Lockout feature will be disabled.
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 CHECK ENGINE light 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
The ECM monitors the voltage level on this circuit. If it detects a voltage when the signal is commanded off, it records this fault code. This fault code can be caused by:
Open circuit in the starter lockout relay, OEM harness, or connectors
Short circuit to a voltage source in the OEM harness or relay.
This fault can also be set active if the over crank protection feature (starter lockout) is enabled, but the engine/ECM is not wired to support it.
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) Starter Lockout Relay failure
2) OEM harness
3) ECM failure
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