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BQ40Z50-R1: Impossible to communicate with bqMtester

Part Number: BQ40Z50-R1
Other Parts Discussed in Thread: BQMTESTER, EV2400, BQPRODUCTION, BQ34Z100, BQ34Z100-G1, BQ34110, BQ40Z50, BQSTUDIO


I am using the bq40z50-R1, configured with bq studio.

Now I would like to test it  with the production tool bqMtester ( HPA495 rev A) + EV2400

I followed the schematic SLUU397A–figure 2

I can't communicate with bq production SBB, the led "current on" and "voltage on" stay OFF on the bqMtester.

It seems J1 vout  should  be 5V to work properly  but it is  0V? does the EV2400 supply the I2c or do I have to add a second external 5V?