462 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
ECM chassis ground (Pin A of
connector 9260) using DMM.
connector. Use a breakout box to measure resistance
from X1-6 to Pin C (spec < 5 Ω).
Connect engine harness to valve cover gasket connector. Use the EST to clear DTCs. If test results are to
spec for all test conditions, but an active code remains, remove valve cover and check between valve cover
gasket connector and ICP sensor. (See Circuit Checks for ICP Sensor – ECM to ICP Sensor.)
1
Connector 9260 is a 2-wi r e connector usually lo c ated 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 g round
circuit 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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