Engines / Diesel / 2.5/128/120/96 kW TDI-PD AXE; BLJ AXD / Test of engine temperature sensor

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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:
- engine temperature = ambient temperature
- engine speed = X

connect with the control unit XX - engine

XX - Measured values group XXX
observe values:
field X = actual value (fuel temperature)
field X = actual value (intake air temperature)
field X = actual value (engine temperature)

desired condition:
field X = field X = field X = ambient temperature ± X°C

Start the engine

- engine speed = idling

desired condition:
field X, field X, field X - increasing
field X > field X
field X = ambient temperature + X - XX °C

upon non--achievement of condition - check component: temperature sensor, line, connector connections

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