Monitoring Ebp Using Pressure Sensor Breakout Harness - Navistar International DT 466 Diagnostic/Troubleshooting Manual

Monitoring EBP using Pressure Sensor Breakout
Harness
NOTE: Do this procedure, if an EST is not available.
This is an alternate method.
Tools
• Pressure sensor breakout harness
• Digital Multimeter (DMM)
Figure 303 Pressure Sensor Breakout Harness
to EBP sensor
1. See "DT 466 Performance Specifications" –
Appendix A (page 595) or "DT 570 and HT 570
Performance Specifications" – Appendix B (page
619) for specifications and record on Diagnostic
Form.
2. Connect Pressure Sensor Breakout Harness to
engine harness and EBP sensor.
3. Use DMM to measure EBP at high idle, no load.
• Connect POS to green (signal circuit) and
NEG to black (signal ground).
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.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
4. Run engine at high idle, no load.
5. Record results on Diagnostic Form.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
• If restriction is to specification, do the
following:
a. Turn ignition switch to OFF.
b. Reconnect EGR control valve.
c. Turn ignition switch to ON.
d. Clear all DTCs.
e. Continue Performance Diagnostics.
• If restriction is above specification, remove
exhaust pipe from turbocharger outlet and
retest.
• If restriction is to specification with exhaust
pipe removed, do the following:
a. Turn ignition switch to OFF.
b. Reconnect EGR control valve.
c. Turn ignition switch to ON.
d. Clear all DTCs.
e. Correct problem from turbocharger
outlet to tail pipe.
• If exhaust back pressure is still high with pipe
removed from turbocharger outlet, do the
following:
a. Turn ignition switch to OFF.
b. Reconnect EGR control valve.
c. Turn ignition switch to ON.
d. Clear all DTCs.
e. An inoperative
suspect. An EST is needed to run
Test 13 Air Management and Test 14
VGT Test.
233
turbocharger is