6 PERFORMANCE DIAGNOSTICS 253
14. VGT Test
Figure 329
Purpose
To determine if EBP and MAP change, as VGT cont
rol
changes
This is a manual test that allows the technici
an to set
VGT duty to low, medium or high.
Tools
• EST with MasterDiagnostics® software
• EZ-Tech® interface cable
Procedure
WARNING: To avoid serious personal in
jury,
possible death or damage to the engin
eor
vehicle, read all safety instructi
ons in the “Safety
Information” section of this manua
l.
NOTE: The KOER VGT Test can only be
done with
the EST using M asterDiagnostic
s® software.
Figure 330 VGT session
1. With the engine running, select
D_KOER_AirManagement.ssn from the
open session file window and select OPEN to
open the session. Monitor EBP and MAP at low
,
medium, and high duty cycle.
Figure 331
2. Select Diagnostics from the m enu bar.
3. Select Key-On Engine-Running Tests from the
drop down menu.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
©August 2008 Navistar, Inc.
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