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BQ40Z80: The BMS is not charging or discharging the battery and can't even access through I2C

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQ25792, , BQSTUDIO, EV2400

I have designed a BMS system with 4 cells in the series configuration using BQ40Z80RSMT IC. I have verified the schematic and footprints and the connections to the IC. I am not able to access the internal registers of the BMS module through I2C the device is not responding to the address 0x16. Also, the DSG pin is low and the battery voltage is only coming up to the VCC pin. Can you please help me to identify the issue?

The BMS is connected to a battery charger IC BQ25792 for charging and discharging. The charging is happening when I connect the battery externally without BMS. The battery voltage at VPACK is zero in discharging conditions. Please use the attached schematics