QSK60 CM2358 Fault Code 1117 Power Supply Lost With Ignition On

QSK60 CM2358 Fault Code 1117 Power Supply Lost With Ignition OnData Erratic, Intermittent, or Incorrect.Supply voltage to the ECM fell below a calibrated limit momentarily, or the ECM was not allowed to power down correctly.Possible reduced engine performance.

QSK60 CM2358

Related Contents:

INSITE 8.9.2 Engine Diagnostic Software

Cummings INLINE 6 Diagnostic Adapter



Circuit Description

The engine control module (ECM) receives constant voltage from the batteries through the unswitched battery wires that are connected directly to the positive (+) battery post. The ECM receives switched battery input through the keyswitch wire when the keyswitch is turned ON.


Component Location

The ECM is connected to the battery by a combination of engine harness and OEM harness connected in series. This direct link provides a constant power supply for the ECM. The location of the battery will vary with the original equipment manufacturer (OEM). Refer to the OEM service manual.


Conditions for Running the Diagnostics

This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.


Conditions for Setting the Fault Codes

The Engine Control Module (ECM) detected the ECM power supply was removed before power-down parameters could be saved. The fault code will be active when the keyswitch is turned ON following the incomplete power-down event.


Action Taken When the Fault Code is Active

The ECM logs the fault code immediately when the diagnostic runs and fails.

Power-down data like trip information, maintenance monitor, and fault information will not get saved to permanent memory when the keyswitch is turned OFF.


Conditions for Clearing the Fault Code

To validate the repair, start the engine, let it idle for 1 minute, and then shutdown the engine.

The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.

The “Reset All Faults” command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.


Shop Talk

Make sure the ECM unswitched battery supply is coming directly from the battery and not the starter. If unswitched power is coming from the starter, it is possible for the battery voltage to drop low enough during cranking to set this fault active.This fault can also be caused by resistance in the ECM battery supply (+) or (-) circuits. Resistance in these circuits can cause the voltage level at the ECM input to drop low enough to set Fault Code 1117 active. Use of battery disconnect switches can cause this fault to become active.

More repair case for QSK60 CM2358,please refer to QSK60 CM2358 Trouble Repair

Visited 1 times, 1 visit(s) today