Navistar International DT 466 Diagnostic/Troubleshooting Manual page 521

7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
The RSE circuit requires the use of vehicle circuit diagrams. See truck Chassis Electrical Circuit Diagram
Manual for circuit numbers, connector and fuse locations.
Voltage Checks at Solenoid Connector (Disconnect solenoid. Turn the ignition switch to ON.)
Test Point
KOEO
A to gnd
B to gnd
Output State Test - Voltage Check at Shutter Connector (Disconnect solenoid. Turn the ignition switch to
ON. Run the Output State Tests. For help, see "Diagnostic Software Operation" in Section 3 (page 68) for
procedure to run the Low and High Output State Tests.)
Test State/Point
Output State Test - Low
B+ to Pin B
Output State Test - High
B+ to Pin B
RSE Solenoid Continuity Check (Turn the ignition switch to OFF. Disconnect solenoid.)
B to gnd
A to gnd
B to A
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 negative
battery cable. Disconnect solenoid. Use disconnected negative battery cable for ground test point.)
A to gnd cable
B to gnd cable
Harness Resistance Checks (Turn the ignition switch to OFF. Disconnect solenoid. Connect breakout
box X3 to chassis wiring harness only.)
X3–22 to B
A to Fuse
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Spec Comment
B+ ± 0.5 V
If < B+, check for open circuit. Do Harness Resistance
Checks.
0 V to 0.25 V If > 0.25 V, check ECM programming or open circuit.
Spec Comment
B+ ± 0.5 V If < B+, check ECM programming and check for open circuit.
0 V to 0.25 V
If > 0.25 V, check ECM programming and check for short
to voltage source.
> 1 kΩ If < 1 kΩ, check for short to ground.
> 1 kΩ If < 1 kΩ, check for short to ground.
10 Ω to 30 Ω Expected coil resistance for solenoid.
> 1 kΩ If < 1 kΩ, check for short to ground.
> 1 kΩ If < 1 kΩ, check for short to ground.
< 5 Ω If > 5 Ω, check for harness open between ECM and fan
solenoid.
< 5 Ω If > 5 Ω, check for harness open between fuse and fan
solenoid. See truck Chassis Electrical Circuit Diagram
Manual for fuse information.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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