Bosch Me20 Pinout Verified Portable Here

| Pin Number | Signal Name | Description | | --- | --- | --- | | 40 | A/C Relay | Air conditioning relay control |

If you’ve spent any time working on late-90s to mid-2000s European vehicles—especially —you’ve likely crossed paths with the Bosch ME20 engine control unit (ECU). bosch me20 pinout verified