Simos 33a Pinout Top [90% TOP-RATED]

For the Siemens Simos 3.3A (often labeled with part number 06A 906 033 A) found in VAG vehicles like the Audi A3 1.6i, the "top" or bench pinout is primarily used for reading pincodes, IMMO OFF procedures, or cloning. Simos 3.3A Bench Pinout

Plug B (Brown or Black) – Power and Grounds

This is the most critical plug for bench testing. This is where the high-current power is delivered. simos 33a pinout top

Part 2: Critical Top-Side Pinout Table (80-Pin Variant)

Below is the top-view reference for the most common Simos 33A configuration (80-pin Tyco connector). Pin 1 is indicated by a triangle or dot on the connector housing. For the Siemens Simos 3

Sensors: Includes engine speed sensor (G28), coolant temperature (G62), and oxygen sensors (G39/G108). Part 2: Critical Top-Side Pinout Table (80-Pin Variant)

| Pin # | Signal Name | Wire Color (Typical) | Function | Top-Side Test Point | | :--- | :--- | :--- | :--- | :--- | | Power & Ground | | 1 | KL30 (B+) | Red/Yellow | Main battery voltage (constant 12V) | Near large capacitor | | 2 | KL30 (B+) | Red/Yellow | Second main power input | Near power FETs | | 3 | KL31 (GND) | Brown | Power ground (high current) | TP1 (often) | | 4 | KL31 (GND) | Brown | Second power ground | TP2 | | 5 | KL15 (IGN) | Black/Violet | Ignition switched 12V (wake-up) | Resistor divider area | | CAN Bus & Communication | | 23 | CAN_L (Powertrain) | Orange/Brown | Low-speed CAN bus (500 kbps) | TP23 | | 24 | CAN_H (Powertrain) | Orange/Black | High-speed CAN bus | TP24 | | 25 | K-Line (Diagnostic) | Violet/Yellow | ISO 9141 (legacy diagnostics) | TP25 | | Sensors (5V Reference) | | 30 | Sensor GND | Brown/Blue | Analog sensor ground | TP30 | | 31 | 5V_REF1 | Yellow/Red | 5V supply for MAP, APP, etc. | TP31 | | 32 | 5V_REF2 | Yellow/Brown | 5V supply for EGT, Rail Pressure | TP32 | | Actuators | | 48 | Injector Cyl 1 | Brown/Green | High-side driver output | Near MOSFET driver | | 49 | Injector Cyl 2 | Brown/Yellow | High-side driver output | Near MOSFET driver | | 50 | Injector Cyl 3 | Brown/Grey | High-side driver output | Near MOSFET driver | | 51 | Injector Cyl 4 | Brown/White | High-side driver output | Near MOSFET driver | | 60 | Ignition Coil 1 | Black/Green | IGBT gate drive | TP60 | | 61 | Ignition Coil 2 | Black/Yellow | IGBT gate drive | TP61 | | 62 | Ignition Coil 3 | Black/Grey | IGBT gate drive | TP62 | | 63 | Ignition Coil 4 | Black/White | IGBT gate drive | TP63 | | Oxygen Sensors (Lambda) | | 71 | Heater Control (Bank1) | White/Red | O2 sensor heater ground side | TP71 | | 72 | Pump Current+ (UEGO) | Grey/Blue | Wideband control | TP72 | | 73 | Virtual GND | Grey/Brown | Sensor reference | TP73 | | 74 | Pump Current- | Red/Blue | Wideband return | TP74 |