Aps/Ivs Pin-Point Diagnostics - Navistar International DT 466 Diagnostic/Troubleshooting Manual

306 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS

APS/IVS Pin-Point Diagnostics

Connector Voltage Checks (Disconnect harness from sensor. Inspect for bent pins or corrosion. Connect
breakout harness to chassis harness only. Turn the ignition switch to ON.)
Test Point Spec
A to gnd 0 to 0.25 V
B to gnd 0 V
5 V ±0.05 V Voltage > spec, wire shorted to B+; Voltage < spec, wire open or shorted to
C to gnd
D to gnd 0 V to 0.25
V
F to gnd B+
Connector Resistance Checks to ECM Chassis Ground (Turn the ignition switch to OFF. Connect
breakout harness to chassis harness only. Disconnect chassis connector 9260
A to Pin A (9260) > 1 k Ω
B to Pin A (9260) < 5 Ω
C to Pin A (9260) > 500 Ω
D to Pin A (9260) > 1 kΩ
F to Pin A (9260) > 1 kΩ
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Comment
Voltage > 0.25 V, signal is shorted to V
Ground circuit, no voltage expected
ground
Voltage > 0.25 V, IVS signal wire shorted to V
Voltage < 10.5 V check circuit for open or high resistance – blown fuse
If < 1 kΩ, check for short to ground within wiring harness.
If > 5 Ω, check for open signal ground.
If < 500 Ω, check for short to ground within wiring harness.
If < 1 kΩ, check for short to ground within wiring harness.
If < 1 kΩ with fuse removed, check for short to ground within wiring harness.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
or B+
REF
or B+
REF
1
.)