During a reprogramming, a voltage drop, even a brief one, can interrupt communication between the tool and the ECU, with a real risk of corruption or a damaged ECU. A quality battery maintainer, capable of maintaining a stable voltage without oscillation, is therefore as indispensable as the reprogramming tool itself.
€109,00HT
Gysflash 123-12 CNT (5M cables)
€1.099,00HT
€350,00HT
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Gysflash 100-12 HF (5M cables)
€665,00HT
Why voltage must remain stable
A reprogramming operation (read, write, unlock) requires a stable and sufficient power supply throughout its duration. Any voltage fluctuation exceeding a few tens of millivolts can disrupt communication between the tool and the ECU.
Linear or filtered switching regulated chargers offer better stability than entry-level unfiltered pulse models, a criterion not to be overlooked for this type of use.
Frequently Asked Questions
Is a standard charger sufficient for a remap?
No, not necessarily. You need a trickle charger that can maintain a stable voltage without oscillation; an entry-level charger with unfiltered pulses can disrupt communication with the ECU.
What happens in case of a power failure during writing?
Communication between the tool and the ECU may be interrupted, with a risk of corrupted programming or damaged ECU.
Can a Gysflash charger be attached without drilling the bodywork?
Yes, with the compatible magnetic mounting kit (sold separately), available on the online store.