John Deere Ecu Information Displays And Functions - Magnum MMG 125 Operating Manual

28 Vgen unbal
29 Wrn ECU Alarm
30 Wrn RA15 fail
31 WrnServiceTime

JOHN DEERE ECU INFORMATION DISPLAYS AND FUNCTIONS

This unit has a John Deere Electronic Engine Control Unit (ECU) which regulates the engine speed (RPM) and
constantly monitors vital engine functions for a number of operation, alarm and fault conditions. When an opera-
tion, alarm or fault condition occurs, the Liquid Crystal Display (LCD) window will alert the operator either visually
or audibly. In addition to the "Alarm List", there is an "ECU Alarm List" which will list any faults specified by the
John Deere ECU.
Press the " " Scroll-Up button (on the diagnostic keypad) to view the "ECU Alarm List". This will allow the
operator to view a description of the fault, along with the diagnostic trouble codes located at the bottom of the
display (see FIGURE 1). To further identify a fault by using these codes, refer to the John Deere Operators
Manual supplied with the unit. To resume operation, the fault condition must be resolved and the code cleared
from the display.
Diagnostic messages are read and displayed in the ECU Alarm List. The Suspect Parameter Number (SPN),
Failure Mode Identifier (FMI) and Occurrence Counter (OC) are shown together with a description if possible.
One SPN /FMI describes one fail information. If FMI is equal to 0 or 1, WRN is displayed in the ECU Alarm list.
For any other FMI value FLS is displayed. Detailed SPM/FMI may been seen in SAE HS-1939 Publication, or
refer to engine manufacturers ECU error codes list.
Following ECU messages are displayed with the description:
1 SPN:100
2 SPN:102
3 SPN:105
4 SPN:110
5 SPN:175
6 SPN:629
7 SPN:636
8 SPN:637
9 SPN:651
10 SPN:652
11 SPN:653
12 SPN:654
13 SPN:655
14 SPN:656
15 SPN:677
16 SPN:1485
SD NO
WRN NO
WRN NO
WRN NO
The generator voltage is unbalanced more than the value of
Volt unbal setpoint.
ECU alarm list is not empty.
Warning alarm in case of lost connection to IGL-RA15 module.
The period for servicing is set by the NextServTime setpoint.
The protection comes active if the running hours of the engine
reach this value.
EngOil Press
Boost Press
Intake Temp
EngCool Temp
EngOil Temp
Controller #1
PositionSensor
TimingSensor
InjectorCyl#1
InjectorCyl#2
InjectorCyl#3
InjectorCyl#4
InjectorCyl#5
InjectorCyl#6
EngStartRelay
ECU MainRelay
25