Navistar International DT 466 Diagnostic/Troubleshooting Manual page 311

7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
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.
Connector Resistance Checks to Chassis Ground (Turn the ignition switch to OFF. Disconnect chassis
1
connector 9260 . Disconnect negative battery cable. Disconnect harness from sensor. Use disconnected
negative battery cable for ground test point.)
A to gnd cable > 1 k Ω
B to gnd cable > 500 Ω
C to gnd cable > 500 Ω
D to gnd cable > 1 kΩ
F to gnd cable > 1 kΩ
Harness Resistance Checks (Connect breakout box [X4 only] to chassis harness only. Connect breakout
harness to chassis harness only.)
X4–18 to A
< 5 Ω
X4–24 to B < 5 Ω
X4–4 to C < 5 Ω
X4–12 to D < 5 Ω
Fuse to F < 5 Ω
NOTE: See truck Chassis Electrical Circuit Diagram Manual for fuse location.
1
Connector 9260 is a 2-wire connector usually located in the battery box. Pin A is the chassis ground connection for the
ECM and IDM. See truck Chassis Electrical Circuit Diagram Manual for complete chassis side ECM and IDM ground
circuit information.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
If < 1 kΩ, check for short to ground.
If < 500 Ω, check for open signal ground.
If < 500 Ω, check for short to ground.
If < 1 kΩ, check for short to ground.
If < 1 kΩ with fuse removed, check for short to ground.
If > 5 Ω, check for APS signal wire open.
If > 5 Ω, check for open signal ground.
If > 5 Ω, check for open V
If > 5 Ω, check for open IVS signal wire.
If > 5 Ω, check for open IVS power wire.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
wire.
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