| Special tools, test equipment as well as aids required |
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| Test box -V.A.G 1598/22- or - V.A.G 1598/31- |
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| Voltage tester, e.g. -V.A.G 1527 B- |
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| Measuring tool set, e.g. -V.A.G 1594 A- |
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| Battery voltage at least 11.5 volts |
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| Connect → Chapter test box at wiring loom to the engine control unit. |
| For engine with engine identification characters AGU |
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| Connect the voltage tester between bush 3 (pos.) and bush 20 (signal). |
| For engine with engine identification characters ARZ, ARX, AUM |
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| Connect the voltage tester between bush 3 (pos.) and bush 54 (signal). |
| Continued for all engines |
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| Rotate front wheel and observe the voltage. |
Note | The right front wheel must not turn along, if necessary hold. |
| The voltage tester must flash (very short flashing signal). |
| If voltage tester does not flash: |
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