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Groundsmaster 5900 T4F Diagnostic Fault Code Quick Reference Table – Rev. D Page 1 of 6

GROUNDSMASTER 5900 (TIER 4) DIAGNOSTIC FAULT CODE

QUICK REFERENCE TABLE

Directions:

Perform the Service Actions in the order they are presented. Every Service Action has the potential to repair the fault completely. Test the machine after

the completion of each Service Action to verify the active fault remains. If the fault is still active, perform the next Service Action step. Continue this

process until the fault is no longer reported.

Fault

Number

Fault Title

Controller

Affected

Fault Condition/

Circuit Description

Additional Notes

Service Actions

Pedal sensor-

voltage out of range

Master TEC

This fault is reported when the

traction pedal potentiometer

reading is out of range (0.25V–

4.75V), indicating either an open

or short circuit.

1) Perform the Traction Pedal

Position Sensor Calibration

procedure using the InfoCenter.

2) Check the traction pedal

potentiometer.

3) Test the circuit wiring.

4) Check the connections to the

potentiometer and controller.

5) Replace the potentiometer.

Pedal sensor-

analog and digital

signal conflict

Master TEC

This fault is reported when the

analog and digital signals of the

potentiometer are in conflict with

one another.

The potentiometer has

one analog signal (to

indicate pedal angle)

and two digital signals

(to indicate pedal

position relative to

Neutral).

1) Perform the Traction Pedal

Position Sensor Calibration

procedure using the InfoCenter.

2) Check the traction pedal

potentiometer.

3) Test the circuit wiring.

4) Check the connections to the

potentiometer and controller.

5) Replace the potentiometer.

Pedal sensor neutral

switch failure

Master TEC

This fault is reported when the

TEC is receiving both Neutral

Fwd and Neutral Rev signals

simultaneously, which is not

physically possible.

Both neutral forward

and neutral reverse

digital inputs are active.

1) Check the traction pedal

potentiometer.

2) Test the circuit wiring.

3) Check the connections to the

potentiometer and controller.

4) Replace the potentiometer.

Summary of content (6 pages)

PAGE 1
GROUNDSMASTER 5900 (TIER 4) DIAGNOSTIC FAULT CODE QUICK REFERENCE TABLE Directions: Perform the Service Actions in the order they are presented. Every Service Action has the potential to repair the fault completely. Test the machine after the completion of each Service Action to verify the active fault remains. If the fault is still active, perform the next Service Action step. Continue this process until the fault is no longer reported.
PAGE 2
Fault Number 5 Fault Title Controller Affected Fault Condition/ Circuit Description Additional Notes Traction currentvalidation failure Master TEC This fault is reported when the current monitor (which validates the intended traction coil current) is indicating an unexpected variance between the desired level of current and the actual level of current. It is expected that the actual level of coil current will track the desired level of current set by the drive-by-wire module.
PAGE 3
Fault Number 17 Fault Title Controller Affected Fault Condition/ Circuit Description Center deck raise/lower switch malfunction Slave TEC This fault is reported when the TEC is seeing both “center deck raise” and “center deck lower” inputs at the same time. 18 Right deck raise/lower switch malfunction Slave TEC This fault is reported when the TEC is seeing both “right deck raise” and “right deck lower” inputs at the same time.
PAGE 4
Fault Number 87 Fault Title Controller Affected Fault Condition/ Circuit Description Slave contention fault Slave TEC 88 Software version is incompatible Master TEC 89 Machine number(s) unknown Master TEC 90 Inter-TEC Communication Loss Master TEC 91 Master fuse failure Master TEC This fault is reported when one of the three 7.5 amp fuses for the master TEC has failed. 92 Slave fuse failure Slave TEC This fault is reported when one of the three 7.
PAGE 5
Fault Number 94 Fault Title Controller Affected Fault Condition/ Circuit Description Main power relay failure - Slave Slave TEC 95 Radiator electric fan fault Master TEC This fault is reported when the main power relay has failed, or when all three of the 7.5 amp fuses for the slave TEC fail at the same time. This fault is reported when the engine coolant radiator electric fan is overloaded, overheated, draws too much current, or has experienced an internal drive failure.
PAGE 6
Fault Number 124 Fault Title Controller Affected Internal software fault 4 Master TEC 125 Internal software fault 5 Master TEC 126 Internal software fault 6 Master TEC Fault Condition/ Circuit Description This fault is reported when a software fault exists within the master TEC. This fault is reported when a software fault exists within the master TEC. This fault is reported when a software fault exists within the master TEC.