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
• DMM
• ICP System Test Adapter
• Oil sample line with inline shut-off valve
• Clear container (for oil sample)
• Socket or wrench (EOT sensor)
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.
Figure 310 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
1. See "DT 466 Performance Specifications" –
Appendix A (page 595), "DT 570 and HT 570
Performance Specifications" – Appendix B (page
619) or Section 7 "Operational Voltages Checks"
– for specifications and record on Diagnostic
Form.
2. Disconnect engine harness connector from valve
cover gasket for ICP sensor and do steps 3 to 10.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
Figure 311
pass-through connector for ICP sensor
3. Connect VC Gasket Breakout Harness to the
4. Use DMM to measure ICP.
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. Secure the
DMM and leads in the cab so as not to obstruct
the operator.
5. Turn the ignition switch to ON. (Do not start
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
VC Gasket Breakout Harness to
pass-through connector for ICP sensor and
engine harness.
• Connect POS to green (signal circuit) and
NEG to black (ground circuit).
WARNING: To avoid serious personal injury,
engine.) Measure KOEO ICP signal voltage and
record on Diagnostic Form.
• If ICP voltage is higher than specification, the
ICP sensor or circuitry may be at cause. This
will cause a lower than normal injection
control pressure command.
Sensor" in Section 7.
• If ICP voltage is in KOEO specification,
continue to step 6.
239
See "ICP