Comparison Images EWS Oscilloscope Measurement: Important

The DME/DDE must remain connected for the duration of the test-measurement routine.

Fig 1: Display - Signal OK Screen

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Please note that the "OK" assessment relates exclusively to the data wire and the signal shape. It cannot be determined whether the transmitted code is correct.

Fig 2: Display - Signal Not OK Screen

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The above signal indicates a fault in the DME/DDE.

Fig 3: Display - Signal Not OK Screen

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The above signal indicates a wire fault or a fault in the CAS.

Fig 4: Display - Signal Not OK Screen

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The above signal indicates that the EWS vehicle immobilizer has not been enabled or that a short circuit to UBatt is present.

Fig 5: Display - Signal Not OK Screen

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The above signal indicates a short circuit to earth or an open wire/circuit.

Fig 6: Display - Signal OK Screen

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The speed signal from the DSC control unit must be a rectangular signal with amplitude Ubat.