# Fuelpump CAN , Black + PMU16

**URL:** <https://community.ecumaster.com/t/fuelpump-can-black-pmu16/5979>\
**Category:** GENERAL\
**Created:** [June 9, 2026, 8:53am UTC](https://community.ecumaster.com/t/fuelpump-can-black-pmu16/5979 "2026-06-09T08:53:53Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Langgard](https://avatars.discourse-cdn.com/v4/letter/l/bcef8e/32.png) [@Langgard](https://community.ecumaster.com/u/Langgard)\
**Post date:** [June 9, 2026, 8:53am UTC](https://community.ecumaster.com/t/fuelpump-can-black-pmu16/5979/1 "2026-06-09T08:53:53Z")

</div>

After updating from v2 to v3, my fuelpump dont start with CAN signal from black(no priming at power on or when starting)

fuelpump is connected to a PMU16

it did work with v2, is there any big changes on the can-bus communication?