Navistar International DT 466 Diagnostic/Troubleshooting Manual page 274

270
9. Memorize DMM voltage for ICP. After parking
vehicle, record reading on Diagnostic Form; do
not record reading while driving.
• If ICP is to specification, do not continue with
ICP system diagnostics.
• If ICP is not to specification, continue with
step 10.
• If ICP is still unstable, replace IPR valve
following procedures in the Engine Service
Manual and retest
WARNING: To avoid serious personal injury,
possible death or damage to the engine or vehicle
– comply with the following when taking oil
sample:
• When routing oil line, do not run the line too
close to moving parts.
• Do not let the line touch hot engine surfaces.
• Oil is hot. Use protective gloves when taking
oil sample. Use caution handling oil sample to
avoid spilling.
WARNING: To avoid serious personal injury
or possible death, do not allow engine fluids to
stay on your skin. Clean your skin and nails
with soap and water, or a good hand cleaner.
Wash or properly throw away clothing or rags
containing engine fluids. Engine fluids contain
certain elements that may be unhealthy for skin
and could even cause cancer.
NOTE: Engine fluids, oil, fuel, and coolant, can be a
threat to the environment. Never dispose of engine
fluids by putting them in the trash, pouring them on the
ground, in the sewers, in streams or bodies of water.
Collect and dispose of engine fluids according to local
regulations.
10. Turn off engine.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
Figure 352 Test hose assembly
11. Use the ICP system test adapter and inline
12. Remove EOT sensor from EOT port. Oil will spill
13. Run engine at high idle for 2 minutes. Record
14. Return engine to low idle, take oil sample, and
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
1. Inline shut-off valve
2. ICP system test adapter
3. Oil sample line
shut-off valve to make a test line assembly to
take oil sample.
NOTE: The mechanic is expected to keep the
test line for future diagnostics. Expense the test
line as an essential tool and keep it with other
diagnostic tools. Warranty will not cover the cost
of the test line.
out. Quickly install test hose assembly.
ICP initially as high idle is set, then again after 2
minutes. Compare the two ICP readings. ICP that
rises above the spec, at any point during the two
minutes, indicates aeration.
check for aerated oil.
• If oil is aerated, a large quantity of air bubbles
mixed throughout the oil, or foam build up on
top of the oil will be seen. Correct condition.
• If oil is not aerated, disconnect ICP sensor
and check engine stability.
corrected, see "ICP Operational Voltage
Checks" in Section 7.
If problem is