Nexus 5 BATT_ID issue

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  • audiomodder
    Senior Member
    • Dec 2017
    • 54
    • USA
    #1

    Nexus 5 BATT_ID issue

    Hey folks,
    I have a used Nexus 5 motherboard I bought with a ripped out battery connector. Replaced the connector but phone won't start unless VBATT_THERM is disconnected. Then it seems to work fine but of course only shows 0% charge. Did factory reset and it does detect the charger.
    I've tried 3x batteries and they all measure ~68Kohms to ground on that pin.

    To make matters weirder, BATT_ID is grounded on the battery itself, I cannot understand why they even bothered with it connecting to the MCU. VBATT_THERM (i.e. VBAT_THRM) also connects to the MCU.

    Schematics (page 223): https://mega.co.nz/#!AoY2gKbA!5fTTr1...p6Od5GPNdUL7Rw

    Thanks for any help!
    Tags: None
    • audiomodder
      Senior Member
      • Dec 2017
      • 54
      • USA
      #2
      Re: Nexus 5 BATT_ID issue

      traced everything out and I think it must be the GPIO pins on the MCU. cant fix it without painful BGA work :/

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