| The signal generated by the engine revs sender cannot be analysed in its original form, and the engine control unit must adapt it for posterior applications. The signal is needed for, for example, the automatic gearbox control unit to calculate when to shift gears, and the rev counter in the instrument panel. |
| Special tools and workshop equipment required |
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| Test box -V.A.G. 1598/31- |
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| Auxiliary measurement set -V.A.G. 1594 A- or -V.A.G. 1594 C- |
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| Hand-held multimeter -V.A.G. 1526- or multimeter -V.A.G. 1715- |
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