7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 493
Figure 479 Cylinder 5 and 6 circuit diagra
m
Injector Cy linder 5
Test Point
Spec Comment
X2–2 to X2–17
0.7 Ω to 1.5 Ω If > 1.5 Ω, check for open or high resistance between IDM
and injector, or open injector coil
X2–2 to gnd, X2–17 to gnd
>1kΩ If < 1 kΩ, check for short to ground in harness or injector
coil. Disconnect injector a nd retest. If > 1 kΩ,theshort
is in the injector.
X2–6 to X2–18
0.7 Ω to 1.5 Ω If > 1.5 Ω, check for open or high resistance between IDM
and injector, or open injector coil
X2–6 to gnd, X2–18 to gnd
>1kΩ If < 1 kΩ, check for short to ground in harness or injector
coil. Disconnect injector a nd retest. If > 1 kΩ,theshort
is in the injector.
Injector Cy linder 6
Test Point
Spec Comment
X2–4 to X2–19
0.7 Ω to 1.5 Ω If > 1.5 Ω, check for open or high resistance between IDM
and injector, or open injector coil
X2–4 to gnd, X2–19 to gnd
>1kΩ If < 1 k Ω, check for short to ground in harness or injector
coil. Disconnect injector and retest. If > 1 kΩ, the short
is in the injector.
X2–8 to X2–20
0.7 Ω to 1.5 Ω If > 1.5 Ω, check for open or high resistance between IDM
and injector, or open injector coil
X2–8 to gnd, X2–20 to gnd
>1kΩ If < 1 k Ω, check for short to ground in harness or injector
coil. Disconnect injector and retest. If > 1 kΩ, the short
is in the injector.
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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