300 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
APS/IVS (Accelerator Position Sensor and Idle
Validation Switch)
Figure 375 Function diagram for the APS/IVS
The function diagram for the APS/IVS includes the
following:
• APS/IVS
• Injection Control Pressure Regulator (IPR)
• Electronic Control Module (ECM)
• Variable Geometry Turbocharger (VG T )
• Injection Driver Module (IDM)
• Fuel injector
• ENGINE lamp (amber)
Function
The APS/IVS sensor is a cab mounted potentiometer
sensor. When the APS receives a 5 V reference signal
and a ground from the ECM, a linear analog voltage
signal from the sensor will indicate the operator’s
demand for power. The IVS provides 0 V or 12 V to
the ECM as redundant signal to verify the pedal idle
position.
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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