ensti-5发动机诊断一般说明3注意general description03.pdfVIP

GENERALDESCRIPTION

ENGINE(DIAGNOSTICS)

3.GeneralDescription8)UsetheECMmountingstudboltatthebody

headgroundingpointswhenmeasuringvoltage

A:CAUTIONandresistanceinsidethepassengercompartment.

1)Airbagsystemwiringharnessisroutednearthe

ECM,mainrelayandfuelpumprelay.

CAUTION:(A)

•Allairbagsystemwiringharnessandcon-

nectorsarecoloredyellow.Donotusetheelec-

tricaltestequipmentonthesecircuit.

•Becarefulnottodamagetheairbagsystem

wiringharnesswhenservicingtheECM,TCM,

mainrelayandfuelpumprelay.

2)Neverconnectthebatteryinreversepolarity.EN-00069

•TheECMwillbedestroyedinstantly.

•Thefuelinjectorandotherpartwillbedamaged(A)Studbolt

injustafewminutesmore.

3)Donotdisconnectthebatterycableswhilethe9)Usetheenginegroundingterminalorengine

engineisrunning.properasthegroundingpointtothebody,when

•Alargecounterelectromotiveforcewillbegener-measuringvoltageandresistanceintheengine

atedinthealternator,andthisvoltagemaydamagecompartment.

electronicpartssuchasECM,etc.

4)Beforedisconnectingtheconnectorsofeach

sensorandtheECM,besuretoturntheignition

switchtoOFF.

5)Poorcontacthasbeenidentifiedasaprimary

causeofthisproblem.Tomeasurethevoltageand/

orresistanceofindividualsensorso