Unlocking the Power of PIWIS 3 Coding: A Comprehensive Guide
5. Battery Registration & Coding
When you replace an AGM battery with a lithium-ion retro-fit (common in GT3s), you must recode the BMS (Battery Management System). PIWIS 3 coding lets you change the battery type, capacity (Ah), and manufacturer serial number. Skip this, and your alternator will overcharge or undercharge the new battery.
- Expand:
Vehicle Functions>Comfort>Windows/Mirrors>Mirror Folding. - You will see a dropdown:
Not Active/Active when Locking/Active Manually. - Select your desired value.
Users often use PIWIS 3 to activate or modify specific vehicle functions: Convenience Features : Activating Auto Wipers
Automatic Coding: The system identifies the vehicle's equipment and codes ECUs based on standard configurations.
- The Hardware: You need the specific VCI 3 adapter (the dongle). Older VCI 2 adapters are no longer supported for newer models like the Cayenne 9YB or 992 911.
- The Laptop: It must run on a specific Panasonic Toughbook (usually CF-54) or a high-spec generic laptop with an Intel i5 processor and at least 8GB RAM.
- Online Connection (The "P" Button): While basic diagnostics are offline, Coding and Flashing require an active connection to the Porsche backend servers. This usually requires a
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