Engines / Diesel / 1.9/74kW TDI-PD AVQ / Chiptuning suspecion test

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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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Note:
- second mechanic necessary
- observe the occupation safety rules when taking a test drive with connected diagnostics tester

Conditions:
- engine temperature > XX °C

connect with the control unit XX - engine

from XXXX rpm, accelerate in Xrd gear to about XXXX rpm - accelerator pedal = XXX%
(automatic transmission = D)

XX - Measured values group XXX
field X = XXX% (pedal position - accelerator pedal)

XX - Measured values group XXX
field X = MAX XXX Nm (limitation of torque)

if value is higher - suspicion of power modification - chip tuning

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