Est Data List; Monitoring Engine Systems Using An Est - Navistar International DT 466 Diagnostic/Troubleshooting Manual

6. EST Data List

Figure 181
Purpose
To determine if engine systems meet operating
specifications to start engine

Monitoring Engine Systems using an EST

Tools
• EST with MasterDiagnostics® software
• EZ-Tech® interface cable
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.
NOTE: If an EST is not available, see alternate test
procedures following this test.
Batteries must be fully charged before doing the
following steps.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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.
Figure 182 D_HardStart_ NoStart.ssn
2. Open D_HardStart_NoStart.ssn
engine operation.
3. Turn the ignition switch to ON.
4. Record KOEO readings on Diagnostic Form.
5. Crank engine for 20 seconds and read EST to
measure VBAT, RPM, ICP, EOP, EGRP, and BCP.
6. Record readings on Diagnostic Form.
• Battery voltage must be 7 V or more.
voltage to the ECM drops below 7 V, the
ECM will not remain powered up.
Note: If the battery volt (VBAT) PID is less
than actual battery voltage or the EST is not
communicating with the ECM, see Electronic
Control Module Power (ECM PWR) in Section
7 (page 381).
• Engine
the required injection control pressure to
operate the fuel injectors and create required
compression to ignite the fuel.
EGES-270-1
to
cranking speed must generate
157
monitor
If