What you are using (MPPS, KESS, or an EEPROM programmer)? The exact component part number stamped on your ECU casing?
From the , with the connector facing you, the pin arrangement is typically:
Based on community-sourced information, here are the known assignments for the that the SIMOS 33A uses:
SIMOS 3.3 ECU inner board IC function illustrate for ... - Pinterest simos 33a pinout top
Typically MPC5xx series (dependent on specific variant). Connector: 121-pin connector (T121) Vehicles: VW Golf MK4, Bora, Skoda Octavia, Audi A3/A4.
Each pin in the Simos 33A pinout has a specific function:
It typically contains a 29F400BB Flash chip and a 93C76 EEPROM . What you are using (MPPS, KESS, or an EEPROM programmer)
: Pin 86 provides cylinder-one recognition.
Are you planning to use a specific tool like or K-Tag for this connection?
details the following specific connections for the fuel system: : Controlled via pins that trigger based on firing order. Hall Sender (G40) : Typically connected to pin 62. Coolant Temperature Sender (G62) : Provides input for engine management adjustments. Bench Connection Guide - Pinterest Typically MPC5xx series (dependent on specific
Here is a general representation of the Simos 33A pinout top view:
The Bosch (often stylized as SIMOS 33A) is a prevalent Engine Control Unit (ECU) found in a vast range of modern Volkswagen, Audi, Seat, and Skoda vehicles. From the 1.4 TSI EA211 engines to the 2.0 TDI evo, this compact, high-performance ECU controls everything from fuel injection and ignition to turbocharger management and OBD diagnostics.