7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 531
• If < B+, the concern is w ith engine harness or ECM, check
for a short to ground or open VGT actuator control. Do the
Actuator Control Voltage Check at ECM (page 534) and
Harness Resistance Checks (page 537).
• If equal to B+, the concern is either high resistance in wiring
or the VGT actuator. Do Harness Resistance Checks (page
537) to confirm integrity of wiring. See Chassis Electrical
Circuit Diagram Manual needs to be referenced to check
wiring from BAT
GND
to 12 - Pin Connector.
If integrity of wiring is confirmed to be in good condition,
replace VGT actuator.
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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