Engines / Diesel / EDC 17 CAN general / Test of DPF differential pressure sensor CR

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Mark	Model	Control unit	Diagnostic operation

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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:
• first execute the function: clogging of Diesel particulate filter - Test
• engine speed = X rpm

connect with the control unit XX - engine

XX - Measured values group XXX
required values:
field X = X ± X mbar (differential pressure)

Start the engine

engine speed = idling

wait XXs

XX - Measured values group XXX
required values:
field X = X mbar ± X mbar (differential pressure)

increase rpm to XXXX - XXXX rpm

required values:
field X = XX mbar ± XX mbar (differential pressure)

if values are not achieved - check component: tube to sensor (tightness of line, mistaking), pressure difference sensor DPF - wiring, pressure difference sensor DPF

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