Oil Reservoir Level; 14.3 - Ipr And High-Pressure Pump Operation - Navistar International DT 466 Diagnostic/Troubleshooting Manual

188
WARNING: To avoid serious personal injury,
possible death, or damage to the engine or vehicle
– comply with the following:
While cranking the engine, the engine could start.
• Set the parking brake
• Put transmission in neutral
• Block wheels.
CAUTION: Do not leave the IPR valve energized
longer than 120 seconds — this can damage the IPR
valve.
NOTE: If the engine starts, disconnect ground and B+
at the Actuator Breakout Harness.
4. Using the EST, monitor injection control pressure
while cranking the engine for 20 seconds.
NOTE: If an EST is not available, use alternate
method – Measuring Voltage on ICP Sensor using
a Pressure Sensor Breakout Harness.
5. Record results on Diagnostic Form.
• If injection control pressure increases above
28 MPa (4061 psi) (4.45 V), the mechanical
system is operating correctly for the engine to
start. Either the ECM is not controlling the
IPR or the IPR circuit has failed. Do not
continue with Low ICP System Tests.
Check DTCs found during Test 8 (KOEO
Standard Test). Make sure problems were
corrected.
• For problems in the electrical circuit, see "IPR
(Injection Pressure Regulator)" in Section 7
(page 494).
• If 28 MPa (4061 psi) (4.45 V) can not be
reached. Continue with the next test, 14.2 –

Oil Reservoir Level.

14.2 – Oil Reservoir Level
WARNING: To avoid serious personal injury,
possible death, or damage to the engine or
vehicle, read all safety instructions in the "Safety
Information" section of this manual.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Figure 226 EOT sensor
1. Disconnect engine harness connector from EOT
sensor installed in the rear of the front cover, left
of the high-pressure oil pump assembly.
2. Slowly loosen the EOT sensor from the EOT port
until oil flows out, indicating that the oil level is
above the sensor. Oil will spill out, if the sensor
is removed. Catch oil in a container.If oil does
not flow out remove sensor.
• If the oil level was above the EOT sensor,
tighten sensor and reconnect the harness.
Do test 14.3 – IPR and High-pressure Pump
Operation.
• If oil level is low, place container under port to
catch oil. Crank engine and check if oil flows
out.
• If oil does not flow out while cranking, the
lube oil pump may not be supplying oil to the
reservoir. See "Low Oil Pressure" in Section
4 (page 128).
14.3 – IPR and High-pressure Pump Operation
WARNING: To avoid serious personal injury,
possible death, or damage to the engine or
vehicle, read all safety instructions in the "Safety
Information" section of this manual.
EGES-270-1