Navistar International DT 466 Diagnostic/Troubleshooting Manual page 218

214
• OCC fault for the IPR valve or brake shut-off valve
(if equipped)
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
•
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Inlet Air Heater (IAH)
— For initial calibrations, if the system voltage
is less than 13 volts, DTC 251 may become
active.
— Later calibrations and current hardware levels
do not support DTC 251.