15. Inlet Air Heater System; 15.1 - Current Amperage Draw - Navistar International DT 466 Diagnostic/Troubleshooting Manual

15. Inlet Air Heater System

Figure 248
Purpose
To determine if the Inlet Air Heater assembly is
operating correctly
Tools
• EST with MasterDiagnostics® software
• EZ-Tech® interface cable
• Digital Multimeter (DMM)
• Amp Clamp
15.1 – Current Amperage Draw
Procedure
WARNING: To avoid serious personal injury,
possible death, or damage to the engine or
vehicle, read all safety instructions in the "Safety
Information" section of this manual.
NOTE: Inspect for damaged, loose or corroded
terminals. Repair if necessary.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Figure 249 Amp Clamp
1. Install Amp Clamp around one of the two feed
wires.
2. Turn the ignition switch to ON.
Figure 250 Inlet Air Heater Output State Test
NOTE: When using the EST to do KOEO or KOER
diagnostic tests, Standard Test is always selected
and run first. If the ignition switch is not cycled, the
Standard Test does not have to be run again.
3. Select Diagnostics from the menu bar.
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