Service
i08097900
Service Tool Features
Note: With the release of Tier 4 Final engines, more
emissions control system components have been
added to the engine to reduce the NOx output. The
addition of these components requires two Electronic
Control Modules (ECMs) for the engine and
aftertreatment systems to operate. The most recent
version of the electronic service tool must be used
when connecting to the ECMs. Refer to
Troubleshooting, “Electronic Service Tools” for
instructions on correctly setting up the computer and
the adapter for use on Tier 4 applications.
Override Parameters
The override parameters screen has multiple
overrides. The parameters control various functions
on the engine and the aftertreatment. These
functions and features allow the technician to
troubleshoot different engine systems.
In the electronic service tool, select the engine ECM
or the Diesel Exhaust Fluid Controller (DCU) as
appropriate for the required override.
Override Parameters Listed in the Engine
ECM Menu
Aftertreatment #1 Intake NOx Level
Sensor Power Supply Override
This override can be used during troubleshooting to
reset the SCR intake NOx sensor without having to
cycle key power to the Engine ECM.
Aftertreatment #1 Outlet #1 NOx Level
Sensor Power Supply Override
This override can be used during troubleshooting to
reset the SCR Outlet NOx Sensor without having to
cycle key power to the Engine ECM.
Aftertreatment #1 DEF Dosing Control
Module Key Switch Line
This override resets the Dosing Control Unit (DCU)
without having to cycle key power to the other ECM's.
The reset ensures that the DCU completes a purge
cycle, resets any active codes, and shuts down
correctly.
This test turns off the key switch power from the
engine ECM to the DCU for approximately 2 minutes.
Once the DCU has successfully powered down and
reset, the key switch power supply will be turned
back on. The DCU will then be operational.
Engine Fan Bypass
This override is used to turn ON the engine fan, if
equipped. The override can be used to test the
engine fan operation. The engine fan speed is
entered as a percent of full speed, allowing the user
to operate the fan at different speeds.
Engine Fuel Supply Lift Pump Relay
Override
This override is used to energize the Electric Fuel Lift
Pump (EFLP) relay. The override can be used to test
the EFLP relay only when engine speed is zero. The
EFLP relay is switched to either ON or OFF.
Engine Shutdown Lamp
This override provides the facility to test the electrical
circuit for the Engine Shutdown Lamp. The override
commands the Engine Shutdown Lamp on.
Ether Starting Aid Override
This override is used to confirm the correct operation
of the ether system. Remove the ether canister from
the system before testing the ether injection system.
Refer to Troubleshooting, “Ether Starting Aid - Test”.
The override requires that engine speed must be
zero. The override will be unavailable for a short
duration if glow plugs are active.
Glow Plug Starting Aid Override
This override is used to check that the glow plugs are
functioning correctly. The override requires that
engine speed must be zero. The override will be
unavailable for a short duration if ether injection is
active.
Override Parameters Listed in the Diesel
Exhaust Fluid Controller (DCU) Menu
DEF Coolant Diverter Valve Solenoid
Override
This override is used to check the electrical operation
of the coolant diverter valve solenoid. This override
will open the coolant diverter valve. This override
allows coolant to flow through the PEU assembly.
This test can be used to verify that the coolant
diverter valve is working correctly.
Unless the function is disabled, the override will
remain enabled for 5 minutes.
454 UENR4469-36
Service
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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