Navistar MaxxForce 9

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DIAGNOSTICMANUAL

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1.VerifyIMPsignalvalueisbetween36psi(248kPa)to42psi*(289kPa),withAPP1signalvalue

at99.6%,andenginespeedbetween1800rpmto2200rpm.

2.VerifyExhaustBackPressure(EBP)islessthan70psi(414kPa),withAPP1signalvalueat

99.6%,andenginespeedbetween1800rpmto2200rpm.

NOTE–*IMPsignalvaluemaybeaslowas29psi(221kPa)onlowerhorsepowercongurations.

NOTE–Analyze0to60mphtestsignalvaluesonlyduringacceleration,andnotdecelerationorshifting.

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Navistar MaxxForce 9 - Page 60