6 PERFORMANCE DIAGNOSTICS 273
9. Memorize DMM voltage for BCP. After parking
vehicle, record reading on Diagnostic Form; do
not record reading while driving.
• If BCP signal voltage is more than KOEO
BCP signal voltage, when engine brake is
inactive, diagnose BCP sensor, c ircuit, and
engine brake components. The BCP voltage
reading should be zero psi; however, BCP
values may fluctuate as much as 345 kPa
(50 psi). Electromagnetic Interference (EMI)
or ground shift can cause an insignificant
voltage shift that does not indicate a problem.
• If BCP signal voltage is equal to KOEO BCP
signal voltage, there is no problem with the
BCP sensor signal or the engine brake.
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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