7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 425
Harness Resistance Checks from EGR Drive Module to EGR Actuator (Turn the ignitio
nswitchto
OFF. Disconnect harness from EGR drive module and EGR actuator. NOTE: Test p oi n
ts are EGR drive
module to EGR a ct uator.)
Pin 6 to Pin 8
<5Ω If > 5 Ω, open circuit or high resistance to M TR U.
Pin 7 to Pin 7
<5Ω If > 5 Ω, ope n circuit or high resistance to MTR V.
Pin 8 to Pin 6
<5Ω If > 5 Ω, open circuit o r high resistance to MTR W.
Pin12toPin1
<5Ω If > 5 Ω, open circuit or high resistance to position sensor power.
Pin13toPin4
<5Ω If > 5 Ω, open circuit or high resistance to position s ensor U.
Pin14toPin3
<5Ω If > 5 Ω, open circuit or high resistance to position sen
sor V.
Pin15toPin2
<5Ω If > 5 Ω, open circuit or high resistance to posit ion sensor W.
Pin16toPin5
<5Ω If > 5 Ω, open circuit or high resistance to position sensor ground.
1
Connector 9260 is a 2-wire connector usually located in the ba t tery box. Pin A is the grou nd connection for the ECM
and IDM. See truck Chassis Electrical C ircuit Diagram M anual for complete chassis side ECM and IDM g round circuit
information.
WARNING: To avoid serious personal injury, possible death, or damage to the engine or vehicle,
make sure the transmission is in neutral, parking brake is set, and wheels are blocked before doing
service bay diagnostics on engine or vehicle.
Harness Resistance Checks from EGR Driv
e Module to 12–pin Connector (Turn the ignition switch to
OFF. Disconnect harness at EGR drive mod
ule and 12–pin connector.)
Test Point
Spec Comment
Pin1toPin10
<5Ω If > 5 Ω, open circuit or high resistance to actuator power.
Pin2toPin4
<5Ω If > 5 Ω, open c ircuit or high resist
ance to actuator ground.
Harness Resistance Checks from EGR Drive Module to ECM (Turn the ignition switch to OFF. Disconnect
harness at EGR drive module and ECM connector X2. Connect breakout box X2 to engine harness only.)
Pin 3 to Pin X2–6
<5Ω If > 5 Ω, open circuit or high resistance to CAN 2 positive.
Pin4toPinX2–13
<5Ω If > 5 Ω, open circuit or h igh res
istancetoCAN2negative.
EGR A ctuator Diagnostic Trouble Codes (DTCs)
DTC 163 = EGR drive module detects position signal fault.
DTC 365 = EGR drive module d
etects actuator fault.
DTC 368 = ECM did not receive EGR drive m odule communication for more than one second.
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.
To Next Page
Loading...
Need help?
General