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32

Measurements and analysis with the VAS 5051

J 220

Hall sender G40

T80/62

T80/76

T80/67

The Hall sender signal enables the engine con- trol unit to recognize the ignition position for cylinder 1 with ignition systems without a distribu- tor. The ignition point for the other cylinders and the commencement of injection are calculated from this.

1/+

3/-

2

G 40

The adjacent circuit diagram shows the electrical connections on the Hall sender G40 of the 1.8 l/92 kW petrol engine. The electric signal of the Hall sender for subse- quent analysis by the DSO is measured at the

following contacts

:

202/044

DSO 1 (+)

DSO 1 ()

Contact 2 (signal) Contact 3 (ground)

The connection to the control unit must not be interrupted in the process, otherwise the engine will stop.

1 2 3

The Hall sender signal between contacts 2 and 3 can be displayed as a curve on the DSO by inter- mediate connection of an adapter lead from the V.A.G. 1594A test set which permits parallel con- nection of the DSO measuring lead of the VAS 5051 tester on the Hall sender.

The individual adapter leads are described on page 30.

The following curve is obtained:

202/075

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