Navistar International DT 466 Diagnostic/Troubleshooting Manual page 471

7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
Figure 468 ICP circuit diagram with VC Gasket Breakout Harness
Operational Voltage Checks for ICP Sensor with VC Gasket Breakout Harness (These checks are done
if an EST is not available and the valve cover is not removed. Check with VC Gasket Breakout Harness
connected to valve cover gasket connector and engine harness.)
Test Point EST voltage readings:
Signal to ground
A to C 0.15 V to 0.3 V
A to C See Performance Specifications.
A to C See Performance Specifications.
A to C See Performance Specifications.
A to C See Performance Specifications.
Operational Voltage Checks for ICP Sensor with Breakout Box (Check with breakout box [X-1]
connected to ECM and engine harness.)
X1–20 to 0.15 V to 0.3 V
X1–6
X1–20 to See Performance Specifications.
X1–6
X1–20 to
See Performance Specifications.
X1–6
X1–20 to See Performance Specifications.
X1–6
X1–20 to See Performance Specifications.
X1–6
ICP Diagnostic Trouble Codes
DTC 124 = Signal voltage was < 0.039 V for more than 0.1 second
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Spec
0 kPa (0 psi)
0 kPa (0 psi)
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Checks
Atmospheric pressure with key-on
engine-off
Minimum at engine cranking speed
Low idle, no load
High idle, no load
Rated speed, full load
Atmospheric pressure with key-on
engine-off
Minimum at engine cranking speed
Low idle, no load
High idle, no load
Rated speed, full load
467