SPN 703 - FMI 11 (Fault Code 779)
SPN703 FMI11 (Auxiliary Equipment Sensor Input 3 - Root Cause Not Known)
Fault Code 779
CODES:
REASON: Auxiliary Equipment Sensor Input 3 - Root Cause Not Known
EFFECT: Possible engine derate.
Circuit Description:
The original equipment manufacturer (OEM) has the option of wiring a pressure or temperature sensor input to the Cummins® electronic control module (ECM). A specific calibration is then created to recognize this pressure or temperature sensor input. This fault code is activated when the pressure or temperature input from the OEM sensor exceeds the engine protection limit defined by the OEM. Depending on OEM requirements, an Engine Protection derate can be associated with this fault code.
Component Location:
The OEM pressure or temperature sensor input will vary, depending on application. Refer to the OEM troubleshooting and repair manual for sensor location.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position.
Conditions for Setting the Fault Codes:
The ECM detects that the engine protection limit for the OEM input device has been exceeded.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
• Engine power can be limited, depending on the specific OEM calibration.
Conditions for Clearing the Fault Code:
The ECM will turn off the amber CHECK ENGINE light immediately after the diagnostic runs and passes.
Shop Talk:
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
This fault code is activated when the pressure or temperature input from the OEM sensor exceeds the engine protection limit defined by the OEM. An engine power derate is possible, depending on the OEM application.
Read More:
SPN 723 - FMI 2 (Fault Code 778)
SPN 723 - FMI 7 (Fault Code 731)
Blog.Teknisi
Fault Code 779
 |
| OEM Temperature/Pressure Sensor Circuit |
CODES:
Fault Code: 779
PID(P), SID(S): S051
SPN: 703
FMI: 11
Lamp: AMBER
SRT:
REASON: Auxiliary Equipment Sensor Input 3 - Root Cause Not Known
EFFECT: Possible engine derate.
Circuit Description:
The original equipment manufacturer (OEM) has the option of wiring a pressure or temperature sensor input to the Cummins® electronic control module (ECM). A specific calibration is then created to recognize this pressure or temperature sensor input. This fault code is activated when the pressure or temperature input from the OEM sensor exceeds the engine protection limit defined by the OEM. Depending on OEM requirements, an Engine Protection derate can be associated with this fault code.
Component Location:
The OEM pressure or temperature sensor input will vary, depending on application. Refer to the OEM troubleshooting and repair manual for sensor location.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position.
Conditions for Setting the Fault Codes:
The ECM detects that the engine protection limit for the OEM input device has been exceeded.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
• Engine power can be limited, depending on the specific OEM calibration.
Conditions for Clearing the Fault Code:
The ECM will turn off the amber CHECK ENGINE light immediately after the diagnostic runs and passes.
Shop Talk:
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
This fault code is activated when the pressure or temperature input from the OEM sensor exceeds the engine protection limit defined by the OEM. An engine power derate is possible, depending on the OEM application.
Read More:
SPN 723 - FMI 2 (Fault Code 778)
SPN 723 - FMI 7 (Fault Code 731)
Blog.Teknisi
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