To connect the Simos 33a ECU to a flashing tool (such as KESSv2, KTAG, or MPPS) on a bench, use the following minimum connections to the 121-pin connector: +12V (Permanent Battery) Pin 87: +12V (Switched Ignition) Pin 1, 2, or 3: Ground (-) Pin 60: K-Line (Signal to Tool)
Connect the black Ground (GND) lead to Pin 2.
To enter on Simos 33A for reading locked ECUs (via Kess, Ktag, or PCMFlash), you need specific pins:
Are you looking for a specific pin number not listed here? Let us know your vehicle model in the comments below!
Board containing this Pin. Car and truck module ECU's repair instructions. 842 Pins. 3 mo. Pinterest·inyectorama Current Flow Diagram for Simos Control | PDF - Scribd simos 33a pinout top
Ensure your workbench power supply delivers a clean, regulated . Low voltage during writing will cause memory corruption.
via an MPPS V18 Breakout Cable Bundle or comparable flash tool:
To minimize the risk of a short circuit or electrostatic discharge (ESD) damaging the Simos 33A, use the following sequence:
The Siemens is an Engine Control Unit (ECU) commonly found in VAG group vehicles (Volkswagen, Audi, Seat, Skoda) from the early-to-mid 2000s, such as the Audi A3 1.6L (AVU engine). Simos 3.3A Pinout for Bench Operations To connect the Simos 33a ECU to a
The SIMOS 33A typically comes in a compact, sealed plastic housing. It is a flash-based ECU (TC1796 processor), making it a popular target for tuning via tools like Kess, Ktag, or MPPS.
(e.g., no communication, misfire on cylinder 2) Is it a manual or automatic transmission?
Connect the black ground clip to the designated negative terminal.
The is a cornerstone hardware platform used across various Volkswagen Audi Group (VAG) vehicles, powering popular 1.6L petrol engines like the AVU and BFQ . Finding the right Simos 33a pinout top diagnostic data is critical for executing an Immo Off configuration, bench flashing, or troubleshooting an engine wire harness swap. Board containing this Pin
Look closely at the plastic mold of the ECU connector headers. Manufacturers print microscopic numbers indicating the beginning and end of each row.
SIMOS 3.3 ECU inner board IC function illustrate for ... - Pinterest
Siemens Simos 3.3A (often labeled Simos 33A) is an engine control unit (ECU) primarily used in Volkswagen and Audi vehicles, such as the Audi A3 1.6L (engine codes AEH, AKL). ECU Overview and Key Features Application : Management system for 4-cylinder petrol engines. Connector Type : 80-pin multi-plug connector. Service Tasks : Common procedures include reading pin codes for (immobilizer bypass) or cloning using bench tools like the Simos 3.3A Pinout Summary
VAG 121-pin connectors have molded numbering etched onto the plastic housing. Always verify pin positions from the perspective of the wiring harness plug side face rather than guessing blindly.