Monitoring Icp Using Vc Gasket Breakout Harness - Navistar International DT 466 Diagnostic/Troubleshooting Manual

Monitoring ICP using VC Gasket Breakout
Harness
NOTE: Do this procedure, if an EST is not available.
This is an alternate method.
Tools
• VC Gasket Breakout Harness
• Digital Multimeter (DMM)
Procedure
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.
WARNING: To avoid serious personal injury,
possible death or damage to the engine or vehicle
- comply with the following:
When running the engine in the service bay, make
sure the parking brake is set, the transmission is
in neutral, and the wheels are blocked.
1. See "DT 466 Performance Specifications" –
Appendix A (page 595) or "DT 570 and HT 570
Performance Specifications" – Appendix B (page
619) and Section 7 for specifications, operational
voltages, and values.
Form.
Figure 183 Valve cover gasket
1. Front of engine
2. Pass-through connector for BCP sensor
3. Pass-through connector for brake shut-off valve
4. Pass-through connector for ICP sensor
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
Record on Diagnostic
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
2. Disconnect engine harness connector from
pass-through connector for ICP sensor.
Figure 184 VC Gasket Breakout Harness
connector to pass-through connector for ICP
sensor
3. Connect VC Gasket Breakout Harness to
pass-through connector and engine harness.
WARNING: To avoid serious personal
injury, possible death, or damage to the
engine or vehicle – comply with the following:
When routing DMM leads, do not crimp the
leads, run the leads too close to moving parts,
or let the leads touch hot engine surfaces.
4. Use DMM to measure injection control pressure
(ICP signal voltage) KOEO.
• Connect POS to green (signal circuit) and
NEG to black (signal ground).
5. Record KOEO reading on Diagnostic Form.
6. Take another measurement while cranking the
engine for 20 seconds.
7. Record reading on Diagnostic Form.
• If ICP voltage is out of specification at KOEO
only, see "ICP Sensor" in Section 7 (page
457).
EGES-270-1
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