Icp Operational Diagnostics - Navistar International DT 466 Diagnostic/Troubleshooting Manual

460 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS

ICP Operational Diagnostics

WARNING: To avoid serious personal injury,
possible death, or damage to the engine or vehicle
– comply with the following:
Be careful to avoid rotating parts (belts and fan)
and hot engine surfaces.
1. Using EST, open the D_ContinuousMonitor.ssn.
Figure 464 Continuous Monitor Test
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
2. To monitor signal voltage, run KOEO Continuous
Monitor Test.
3. Monitor ICP signal voltage. Verify an active DTC
for the ICP circuit.
4. If code is active, do step 6 and 7 to check circuit
for the ICP sensor using the following tables.
•
•
5. If code is inactive, wiggle connectors and wires
at all suspected problem locations.
continuity is interrupted, the EST display DTCs
related to the condition.
6. Disconnect engine harness from valve cover
gasket connector.
NOTE: Inspect connectors for damaged pins,
corrosion, or loose pins. Repair if necessary.
7. Connect VC Gasket Breakout Harness to engine
harness only.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Circuit Checks for ICP Sensor – ECM to Valve
Cover Gasket Connector
Circuit Checks for ICP Sensor – ECM to ICP
Sensor
If circuit