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MacBook Pro A1502 Battery not recognized repair

From Repair Wiki
MacBook Pro A1502 Battery not recognized repair
Device MacBook Pro A1502
Affects part(s) Motherboard
Needs equipment multimeter, soldering iron, soldering station
Difficulty ◉◉◉◌ Hard
Type Soldering, Part replacement


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Problem description

Problem with MacBook Pro A1502 2015-2016 that is not recognizing the battery.

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Symptoms

  • MacBook not recognizing the battery

Solution

First, try a known good battery.

If it doesn't work, check PPBUS_G3H. If it is 12.23 V, the SMC is not communicating with the battery on its data line, either because the SMC is bad, or because the pullup resistors on the data line are bad. On rare occasion U7100 can pull down the data lines. There is a shared data line between the battery, SMC, and ISL6259 (U7100). If PPBUS_G3H is 12.56 V, then you probably have a bad battery.