308 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
Figure 379 APS/IVS circuit diagram
Operational Voltage Checks for APS/IVS
Sensor with Breakout Harness (Check with breakout harness
connected to sensor and chassis har
ness with key-on engine-off.)
• APS test points: (+) A (Green ) to (-)
B (Black)
• IVS test points: (+) D (White) to (-) B
(Black)
Position Voltage
% APS IVS Voltage Comment
Low idle 0.64 V to 0.66 V
0%
0V
IVS tog gles on ly off
idle
High idle 3.84 V to 3.86 V
98% to 102%
B+
Operational Voltage Checks for APS/IVS Sensor w ith Breakout Box (Check with breakout box
connected [X-4 only] to ECM and chassis harness with key-on engine-off.)
• APS test points: (+) X4–18 to (-) X4–24
• IVS test points: (+) X4–12 to (-) X4–24
Position Voltage
% APS IVS Voltage Comment
Low idle 0.64 V to 0.66 V
0%
0V
IVS tog gles on ly off
idle
High idle 3.84 V to 3.86 V
98% to 102%
B+
APS / IVS Diagnostic Trouble Codes
DTC 131= APS signal vo
ltage was < 0.147 V for more than 0.35 seconds
DTC 132= APS signal voltage was > 4.55 V for m ore than 0.35 seconds
DTC 133= APS signal in-range fault
DTC 134= APS and IV
Sdisagree
DTC 135= Idle validation switch circuit fault – 50% APS only
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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