Navistar N10

241DIAGNOSTICTROUBLESHOOTINGPROCEDURES
Step5Inspectengineoillevel.Decision
PerformEngineOilLevelInspection(page2353).
Isengineoilleveltospecication?
Yes:GotoStep6.
No:Correctengineoillevel
problem.Afterrepairsare
complete,retestfororiginal
problem.
Step6Inspectenginecoolantlevelandquality.Decision
PerformCoolantLevelInspection(page2355)andCoolantQualityInspection
(page2356)procedures.
Arecoolantlevelandqualitytospecication?
Yes:GotoStep7.
No:Fillenginecoolantto
specication.Ifcoolantis
contaminated,gotoCoolant
Contamination(page88).
Afterrepairsarecomplete,
retestfororiginalproblem.
Step7VerifyEngineControlModule(ECM)communicateswithElectronicService
Tool(EST),obtainvehiclehealthreport,andcheckforcurrentEngineControl
Module(ECM)calibration.
Decision
A.ConnectESTwithServiceMaxxsoftwareandlog-in.
B.PerformObtainVehicleHealthReport(page2107).
IsESTcommunicatingwiththeECM,andisECMcalibrationcurrent?
Yes:GotoStep8.
No,ECMcalibrationnot
current:Ensurevehiclehas
latestECMcalibration.After
repairsarecomplete,retest
fororiginalproblem.
No,ESTnotcommunicating
withECM:Goto11.0ECM
LossofCommunication
(page43).