Ditch Witch JT100AT - Manual (Page 178)

JT100/JT100 All Terrain Operator’s Manual
Systems and Equipment - 177
Tier 4i Engine
CMW
©
Tier 4i Engine
Overview
This Tier 4i engine has a self-diagnostic 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.
Warning indicators on the diagnostic gauge and engine diagnostic indicator tell the operator when critical
and non-critical faults develop. Non-critical faults occur when engine sensors detect moderate trouble.
Non-critical faults cause the engine diagnostic indicator and diagnostic gauge to light. Critical faults cause
the engine diagnostic indicator to flash and engine diagnostic gauge to light (red). In both cases, a fault
code is stored in the ECU. If the fault causes the engine to derate power but is able to correct itself, the
engine will gradually return to normal power. The engine diagnostic indicator will continue to flash until the
trouble goes away, but a diagnostic code will remain stored.
Engine shutdown will occur due to critical faults in engine oil pressure.
Engine Diagnostic Codes
Problems with the Tier 4i engine usually are indicated by the engine display on the right control console
and by a diagnostic code displayed on the diagnostic gauge.
Operator Alert Indicator
When a non-critical engine fault occurs, the operator alert indicator on the
gauge cluster will light. A fault code will be stored in the diagnostic gauge.
IMPORTANT: For more information on the operator alert indicator and how to operate and read the
engine display, see Controls chapter (page 27).