Bosch M797 Pinout Better !!better!! Page

Pin 13 (Simulates the "ON" position to wake the ECU). Ground (-): Pins 51 and 53. Communication and Programming

Standard cable color assignments for bench work found on OBDII365 . bosch m797 pinout better

For Lada/VAZ models, you must often ground Pin 43 (sometimes through a resistor) to enable programming. Pin 13 (Simulates the "ON" position to wake the ECU)

| Pin | Signal | Type | Notes | |-----|-------------------|-------------|--------------------------------| | A1 | Battery +12 V | Power | Main relay feed | | A2 | Ground | Power | ECU main ground | | A8 | Injector Cyl 1 | Low‑side | 1.5 A peak | | B3 | +5 V sensor out | Reference | 50 mA max | | B12 | Sensor ground | Analog GND | Must not connect to power GND | | B22 | K‑line | Bidirectional | 10400 baud | For Lada/VAZ models, you must often ground Pin

Do not trust wire colors. Use a multimeter in continuity mode.

– An essential resource for understanding the resistor modifications required for flashing the M7.9.7 and M7.9.7+.