162 5 HARD START AND NO START DIAGNOSTICS
WARNING: To avoid serious personal
injury, possible death, or damage to the
engine or vehicle – comply with the following:
When routing DMM leads, do not crimp the
leads, run the leads too close to moving parts,
or let the leads touch hot engine surfaces.
4. Use D MM to measure b rake control p ressure
(BCP signal voltage) KOEO.
• Connect POS to green (signal circuit) and
NEG to black (signal ground).
5. Record KOEO rea ding on Diagnos tic Form.
6. Take another measurement while cranking e ngine
for 20 seconds.
7. Record reading on Diagnostic Form and compare
KOEO reading.
• If BCP cranking signal voltage is significantly
more than KOEO BCP signal voltage,
when engine brake is inactive, diagnose
BCP sensor, circuit, and engine brake
components.
• If BCP cranking signal voltage is equal to
KOEO BCP, signal voltage BCP is not a
problem.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any proced ures.
Follow all warnings, cautions, and notes.
©August 2008 Navistar, Inc.
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