Navistar INTERNATIONAL DT 466 User Manual

410 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
EFP Pin-Point Diagnostics
Connector Voltage Checks (Disconnect harness from the sensor. Inspect for b ent pins or corrosion.
Connect breakout harness to engine harness only. Turn the ignition switch to ON.)
Test Point
Spec Comment
1 to gnd 0 V to 0.25 V
Signal ground (no voltage expected). If > 0.25 V, check ground circuit
for open or high resistance and check signal ground for short to V
REF
or
B+.
2tognd 5V±0.5V
If voltage is not to spec, V
REF
circuit is shorted to ground or B+.
3 to gnd 0 V to 0.25 V
If > 0.25 V, signal circuit is shorted to V
REF
or B+.
Connector Resistance Checks to ECM Chassis Ground (Turn the ignition switch to OFF. Connect
breakout harness to engine harness only. Disconnect chassis connector 9260
1
.)
1 to Pin A (9260) < 5 Ω If > 5 Ω, check for open circuit.
2 to Pin A (9260) > 500 Ω If < 500 Ω, check for short to ground within wiri
ng harness.
3 to Pin A (9260) > 1 kΩ If < 1 kΩ, check for short to ground within wiring harness.
WARNING: To avoid serious personal injury, possible death, or damage to the engine or vehicle,
always disconnect main negative battery cable first. Always connect the main negative battery cable
last.
Connector Resistance Checks to Chassis Ground (Turn the ignition switch to OFF. Disconnect chassis
connector 9260
1
. Disconnect negative battery cable. Disconnect harness from sensor. Use disconnected
negative battery cable for ground test point.)
1togndcable
<500Ω If > 500 Ω, check for short to ground.
2togndcable
>500Ω If < 500 Ω, check for short to ground
.
3togndcable
>1kΩ If < 1 kΩ, check for short to ground.
Harness Resistance Checks (Connect breakout box [X1 and X2] to engine harness only. Connect
breakout harness to engine harness only.)
X1–6 to 1
<5Ω If > 5 Ω, check for open ground w i
re
X1–14to2
<5Ω If > 5 Ω, check for open V
REF
wire
X2–16to3
<5Ω If > 5 Ω, check for open s ignal wire
1
Connector 9260 is a 2-wi r e connector usually lo c ated in the battery box. Pin A is the chassis ground connection for the
ECM and IDM. See truck Chassis Electrical Circuit Diagram Manual for complete chassis side ECM and IDM g round
circuit information.
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.

Navistar INTERNATIONAL DT 466 Specifications

General

Brand	Navistar
Model	INTERNATIONAL DT 466
Category	Engine
Language	English