Navistar INTERNATIONAL DT 466 User Manual

7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 537
NOTE: Turn the ignition switch to OFF when disconnecting engine wiring harness conn
ectors from
components.
See truck Chassis Electrical Circuit Diagram Manual for circuit number
s, connector and fuse locations.
Harness Resistance Checks – ECM to ECM Chassis Ground (Turn the ignition switch to OFF. Disconnect
chassis connector 9260
1
. Connect Turbo Breakout Harness to engine wiring harness only.
Test Point
Spec Comment
1 to Pin A (9260) > 1 kΩ If < 1 kΩ, check for short to ground on actuator power within wiring ha
rness.
2 to Pin A (9260) < 5 Ω If > 5 Ω, check for an open circuit.
3 to Pin A (9260) >1 kΩ If < 1 kΩ, check for short to ground on VGT actuator control 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.
Harness Resistance Checks – ECM to Chassis Groun
d (Turn the ignition switch to OFF. Disconnect
chassis connector 9 260
1
. Disconnect negative
battery cable. Disconnect engine harness from actuator. Use
disconnected negative battery cable for grou
nd test point.
Test Point
Spec Comment
1 to gnd cable
>1kΩ If < 1 kΩ, check for short to ground on actuator power.
2 to gnd cable
>500Ω If < 500 Ω, c heck for short to ground.
3 to gnd cable
>1 kΩ If < 1 kΩ, check for short to ground on VGT actuator control.
Harness Resistance Checks – VGT Actuator to 12-pin Connector (Turn the ignition switch to OFF.
Connect Turbo Breakout Harness to engine wiring harness only. Connect 12-pin Breakout Harness to
engine wiring harness only. Checks are from VGT actuator to 12-pin connector.)
1to10
<5Ω If > 5 Ω, check for open in actuato
r power.
2to4
<5Ω If > 5 Ω, check for open in actuator ground.
Harness Resistance Checks – 12-pin Connector to ECM Chassis Ground (Turn the ignition switch to
OFF. Connect 12-pin Breakout Harness to chassis wiring harness only. Disconnect chassis connector
9260
1
.)
10 to Pin A (9260) > 1 kΩ If < 1 kΩ, check for short to
ground on chassis wiring harness ground circuit.
4 to Pin A (9260) < 5 Ω If > 5 Ω, check for open circuit in chassis wiring ha r ness ground circuit.
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.
Harness Resistance Checks – 12-Pin Connector to Chassis Ground (Turn the ignition switch to OFF.
Disconnect chassis connector 9260
1
. Disconnect negative battery cable. Disconnect 12-pin connector and
use chassis side for test point. Use disconnected negative battery cable for ground test point.)
10 to gn d cable
>1kΩ If < 1 kΩ, check for s
hort to ground.
4 to gnd cable
>500Ω If < 500 Ω, c heck for short to ground.
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