Tata Tiago EV: How I fixed a weird Z-Connect app glitch myself

I noticed someone else on the Tata EV WhatsApp group was also experiencing the same issue on renewing the subscription after a gap.

BHPian varkey recently shared this with other enthusiasts:

So I had renewed my subscription on Saturday after over a year now that the price is reduced. Immediately after paying the fee, the app showed the subscription as active, however the car wasn't showing as connected. I tried going for a 10-15 minute drive, but still no luck, the app would just show the car as Disconnected and error out.

Initially I thought the internal mobile SIM didn't get automatically re-activated, so I emailed ZConnect support (zconnectsupport@tatamotors.com) and followed up with a call (1800-209-8282). They gave a standard response (possibly from their SOP for such issues) to drive the vehicle for 10-15 minutes, park the vehicle, lock, walk away with the key and wait another 5-10 minutes. Then try to send a command from the app. I had already done a similar step, but it made no difference so I conveyed the same. I was asked to email the details (again) so that they can escalate to the concerned team, which I did, shortly after I got a response saying they have escalated it. This was on Saturday night and still no response.

Then I noticed someone else on the Tata EV WhatsApp group was also experiencing the same issue on renewing the subscription after a gap. Based on the discussion, that person had success by force restarting the Telematics Control Unit under the passenger seat.

The telematics unit has a velcro covering and can be accessed from the rear. The TCU connector has many wires, and is a bit big, once removed, re-connect after 3-5 minutes. Be careful not to bend any of the pins. Once reconnected, go for a drive so that the device activates. Initially I did not start the vehicle after the TCU restart, and when the vehicle is off, the unit is mostly in a sleep state. Later during the day once I went for a drive, it quickly updated and showed active connection from the ZConnect app.

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