498 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
The resets f or the IST inc lude:
•PTOisactive.
• Engine speed is not at idle speed (700 rpm).
• Vehicle movement or a Vehicle Speed Sensor
(VSS) fault is detected.
• Engine coolant operating temperature is below 60
°C (140 °F).
• Ambient air temperature is below 16 °C (60 °F) or
above 44 °C (110 °F).
• Brake pedal movement or a brake switch fault is
detected.
• Clutch pedal is depressed or a fault for the clutch
pedal switch is detected (manual transmissions, if
equipped with clutch switch).
• Shift selector is moved from neutral or park
(automatic transmissions).
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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