Engines / Petrol / ME 7.5.20 general / Test - power supply - terminal 30

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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

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Conditions:
- appliances = OFF
- engine speed = idling

connect with the control unit XX - engine

XX - Measured values group XXX
required values
field X = XXX - XXX rpm (engine speed)

upon achievement of values - continue

XX - Measured values group XXX
required values
field X = XX - XX V (on-board voltage - terminal XX)

switch-off the engine

switch-off the ignition

wait XX s

ignition = OFF

connect with the control unit XX - engine

if the control unit is communicating, the power supply is in order

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