Engines / Diesel / 2.0/103kW TDI-PPD BKP;BMA;BVE;BWV / Measurement of compression pressure

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Mark	Model	Control unit	Diagnostic operation

Mark

Select a vehicle make or a common group such as Service Intervals, Engines, Transmissions, Immobilizers and Independent Heaters.

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

This operation was considered useful 6x.

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Conditions:
- number of faults = X
- engine speed = idling
- engine temperature > XX °C

connect with the control unit XX - engine

XX - Measured values group XXX
required values:
field X = ± X,X mg (deviation of injected fuel volume - cylinder X)
field X = ± X,X mg (deviation of injected fuel volume - cylinder X)
field X = ± X,X mg (deviation of injected fuel volume - cylinder X)
field X = ± X,X mg (deviation of injected fuel volume - cylinder X)

Start

switch ignition off for: XX s

switch on the ignition

connect with the control unit XX - engine

XX - Basic settings group XXX

Start

observe values:
field X = engine speed - cylinder X
field X = engine speed - cylinder X
field X = engine speed - cylinder X
field X = engine speed - cylinder X

starter XXs (engine does not Start)

record values measured in fields X - X. Add-up the values for the individual cylinders and divide by X, you thus get the average starting rpm. For example. (XXX+XXX+XXX+XXX)/X = XXX,XX. The values of the individual cylinders must not differ from the average starting rpm by more than X rpm. To increase precision, it is possible to repeat the test.

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