| Brake light and brake pedal switches: testing |
| As the injection system works with a accelerator pedal sender (potentiometer), which can be faulty, for safety reasons, engine supply is cut off when the brakes are applied. For this reason, the control unit needs both the signal from the brake light switch and the signal from the brake pedal switch. This means that if the brakes are applied while depressing the accelerator, the engine supply is immediately cut to idling revs. If the switches are maladjusted involuntary supply cuts may occur. |
| Special tools and workshop equipment required |
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| Fault reader -V.A.G. 1551- or vehicle systems tester -V.A.G. 1552- with lead -V.A.G. 1551/3B- |
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| Test box -V.A.G. 1598/31- |
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| Hand-held multimeter -V.A.G. 1526- or multimeter -V.A.G. 1715- |
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| Auxiliary measurement set -V.A.G. 1594 A- or -V.A.G. 1594 C- |
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