7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 543
Harness Resistance Checks (Turn the ignition switch to OFF. Ensure that all accesso
ries are turned off.
Disconnect sensors and connect breakout box to engine harness only.)
Sensor
Test Point
Spec Comment
EBP 2 to X1–14
<5Ω
MAP 2 to X1–14
<5Ω
ICP
B to X1–14
1
<5Ω
APS C to X4–4 < 5 Ω
BAP 2 to X4–4
<5Ω
EOP
2toX1–14
<5Ω
BCP (optional)
B to X1–14
1
<5Ω
EFP (optional)
2toX1–14
<5Ω
WIF (op tional)
B to X1–14
<5Ω
Measure res istance with DMM from sen s or
connector to breakout box pins. If resistance is > 5
Ω, check for high resistance or an open i n the V
REF
supply circuit.
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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