Engines / Petrol / 2.0/125/147 TFSI CAWA/CAWB/CBLA / Test - knock sensor 1;2 - signal - test drive

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Mark	Model	Control unit	Diagnostic operation

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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:
- knock sensor - tightening torque = XX Nm

- observe the occupation safety rules when taking a test drive with connected diagnostics tester

Start the engine - engine speed = idling

connect with the control unit XX - engine

do a test drive

Conditions:
- engine temperature > XX °C
- idling -> partial load -> full load -> deceleration
- full load = engine speed > XXXX rpm

XX - Measured values group XXX
observe values
field X = X,XV - X,XV (knock sensor X - voltage - cylinder X)
field X = X,XV - X,XV (knock sensor X - voltage - cylinder X)
field X = X,XV - X,XV (knock sensor X - voltage - cylinder X)
field X = X,XV - X,XV (knock sensor X - voltage - cylinder X)

desired condition: (field X = field X = field X = field X) ± X,XXV

XX - end of communication

upon non--achievement of condition - check component:
- knock sensor
- knock sensor - line
- knock sensor - tightening torque

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