Engines / UDS Engines by part number / 01 - Engine [EV_ECM20TDI01105L906023E 006006] / Test of load signals for alternator

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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

Part 1 of the order number Select the first three characters of the order number of the engine control unit. This number can be found in the VCDS when linked to the uniform in the SW order number field. Do not insert the ordering number from the control unit packaging here!!!

Select the first three characters of the order number of the engine control unit. This number can be found in the VCDS when linked to the uniform in the SW order number field. Do not insert the ordering number from the control unit packaging here!!!

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

Advanced Measured Values

select item in menu: IDEXXXXX - alternator-GEN_LOAD_MES

TIP! For easier search in the menu, enter the code IDE, ENG or MAS into the "Filter" window

required values:

X% - XXX% (alternator load)

The value must be changed upon switching the appliances on/off

if values are not achieved, check part:
- wiring: alternator - starter - engine control unit - air-conditioning
- alternator

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