466 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
C to gnd cable > 500 Ω If < 500 Ω, check for short to ground.
Harness Resistance Checks (Connect breakout box [X1] to engine harness only. Connect VC Gasket
Breakout Harness to engine harness only.)
X1–20toA
<5Ω If > 5 Ω, check for open ICP signal.
X1–14toB
<5Ω If > 5 Ω, check for open V
REF
.
X1–6 to C < 5 Ω If > 5 Ω, check for open ground.
1
Connector 9260 is a 2-wire connector usually in the battery box. Pin A is the chassis ground connection for the ECM
and IDM. See truck Chassis Electrical Circuit Diagram Ma
nual for complete chassis side ECM and IDM ground ci rcuit
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.
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