Engines / Petrol / Magneti Marelli 4HV general / Test - heating of lambda probe(s)

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Mark	Model	Control unit	Diagnostic operation

Mark

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Model

Control unit Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Diagnostic operation Select the desired diagnostic procedure.

Diagnostic procedure

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Conditions:
- engine speed = idling

connect with the control unit XX - engine

XX - Measured values group XXX
desired condition:

field X = Htg. ON / Htg. OFF (the value must change according to the actual condition - temperature of part: Lambda-sensor upstream of catalyst)

field X = Htg. ON / Htg. OFF (the value must change according to the actual condition - temperature of part: Lambda-sensor downstream of catalyst )

if values are not achieved - check component:
- fuse
- Lambda sensor(s)
- line
- measure resistance between terminals - Lambda sensor(s) X,X - required values X.X - XX.X Ohm (XX°C)

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