Ditch Witch RT115 - Manual (Page 212)

RT115 Tier 3- SERVICE
AS NEEDED
212 RT115 Tier 3 - SERVICE
AS NEEDED
TIER 3 SERVICE OVERVIEW
Tier 3 is a computer-controlled fuel management system. A
variety of sensors send input data to an ECU (Electronic Control
Unit) that compares inputs with pre-programed memory and
sends output voltage to a variety of actuators to adjust and
operate the engine within specified parameters.
The system is self-diagnostic with stored trouble codes displayed
on the tachometer/diagnostic gauge or read directly from a
diagnostic connector. For more information about the diagnostic
system and trouble codes see "Troubleshooting" in the repair
guide.
An operator alert indicator tells the operator when warning faults
or engine shutdown faults develop. Warning faults occur when
engine sensors indicate moderate trouble with coolant
temperature, oil pressure, charge air temperature, or fuel
temperature. Warning faults cause the operator alert indicator to
flash, and the engine will begin a slow power derate. In some
situations an alarm may also sound. A trouble code is stored in
the ECU. If the fault corrects itself, the engine will gradually return
to normal power. The alert indicator will continue to flash until the
trouble goes away, but a trouble code will remain stored.
Engine shutdown will occur due to severe faults in engine coolant
temperature, oil pressure, or fuel temperature. Before shutdown,
the operator alert indicator will light continuously and the engine
will begin a rapid power derate. If the fault does not improve in 30
seconds the engine will shut down.
Engine Diagnostic Codes
Problems with the Tier 3 engine usually are indicated by the
operator alert indicator and by a diagnostic code displayed on the
tachometer/hourmeter/diagnostic gauge.
TIER 3 SERVICE OVERVIEW
Tier 3 is a computer-controlled fuel management system. A
variety of sensors send input data to an ECU (Electronic Control
Unit) that compares inputs with pre-programed memory and
sends output voltage to a variety of actuators to adjust and
operate the engine within specified parameters.
The system is self-diagnostic with stored trouble codes displayed
on the tachometer/diagnostic gauge or read directly from a
diagnostic connector. For more information about the diagnostic
system and trouble codes see "Troubleshooting" in the repair
guide.
An operator alert indicator tells the operator when warning faults
or engine shutdown faults develop. Warning faults occur when
engine sensors indicate moderate trouble with coolant
temperature, oil pressure, charge air temperature, or fuel
temperature. Warning faults cause the operator alert indicator to
flash, and the engine will begin a slow power derate. In some
situations an alarm may also sound. A trouble code is stored in
the ECU. If the fault corrects itself, the engine will gradually return
to normal power. The alert indicator will continue to flash until the
trouble goes away, but a trouble code will remain stored.
Engine shutdown will occur due to severe faults in engine coolant
temperature, oil pressure, or fuel temperature. Before shutdown,
the operator alert indicator will light continuously and the engine
will begin a rapid power derate. If the fault does not improve in 30
seconds the engine will shut down.
Engine Diagnostic Codes
Problems with the Tier 3 engine usually are indicated by the
operator alert indicator and by a diagnostic code displayed on the
tachometer/hourmeter/diagnostic gauge.