High Pressure Pump Test; Icp Diagnostics - International VT 275 V6 Manual

High Pressure Pump Test

• The pump can be deadheaded by installing
the ICP Leak Test Plug (ZTSE4690) in
place of the rear left bank port plug, and
the ICP Sensor Adapter ( also ZTSE4690)
in place of the rear right bank port plug.
Install the ICP sensor in the top of the ICP
Sensor Adapter and connect the ICP
sensor to the harness using the three-wire
Pressure Sensor Breakout
(ZTSE4347) as an extension, if needed.
Leave the valve covers off. Crank the
engine while measuring ICP pressure.
• If the ICP pressure exceeds 500 psi, the
pump is not at fault and there is a leak in
the system.
• If the pressure is below the minimum
cranking pressure, and there are no leaks
around the pump, remove the pump from
the crankcase. Oil should come up from
the pump feed port in the crankcase
indicating that the reservoir has oil. If the
reservoir had oil, the pump is inoperative.
ICP Diagnostic Test
KOEO Standard Test
ICP System Function Test
IPR Function Test
Under the Valve Cover Leak Test
Cylinder Head Isolation
High Pressure Pump Test
Harness
I I C C P P
S S E E N N S S O O R R
A A D D A A P P T T E E R R
Purpose
Verifies the IPR Circuit
Verifies that the ECM can control the IPR
Verifies the IPR is working
Locates leaks under the valve cover
Identifies which bank of cylinders
has a high pressure leak
Verifies the pump's operation
International ® VT 275 V6 Engine
DIAGNOSTIC TESTS
I I C C P P
S S E E N N S S O O R R
R R I I G G H H T T B B A A N N K K R R A A I I L L

ICP Diagnostics

• If there is lube oil pressure while cranking,
the IPR functions, and there are no leaks in
the hydraulic lines or rails, then either the
pump is not getting oil from the reservoir,
the pump is not turning with the
crankshaft, or the pump is defective.
• Rotation can be verified by removing the
high-pressure pump cover and cranking
the engine while observing the pump gear.
Oil in the reservoir can be verified by
removing the pump and observing the oil
flow from the pump feed passage in the
crankcase. Oil should come up from the
pump passage indicating that the reservoir
has oil. If the reservoir had oil, the pump
is inoperative.
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