7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 325
ECM chassis ground (Pin A of
connector 9260) using DMM.
resistance from X1-6 to Pin C (spec < 5 Ω).
Connect engine harness to UVC 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 UVC gasket connection and
BCP sensor. (See Circuit Checks for BCP – ECM to BCP Sensor.)
1
Connector 9260 is a 2-wire connector us ually 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 comp lete chassis s ide ECM and IDM g r ou nd
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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