Engines / Diesel / EDC 17 UDS general / Test of fuel temperature sensor (G81) CFFx

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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

connect with the control unit XX - engine

Start the engine

engine speed = idling

wait XXs

Advanced Measured Values

select item in menu: IDEXXXXX - fuel temperature - TFU

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

required value:

fuel temperature - actual value

(values must rise smoothly, it is recommended to use a graphics display for this function)

TIP! Move the line and connector connection on the sensor and observe whether the values do not change sharply

if values are not achieved - check component:
- fuel temperature sensor
- wiring
- connector connections
- disconnect from power supply part - fuel temperature sensor. measure resistance between terminals - required values:

XX°C - XX°C = X,X kOhm
XX°C - XX°C = X,X kOhm

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