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| {{Repair Guide
| | connector readings |
| |Device=IPhone 15 Pro, IPhone 15 Pro Max
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| |Needs equipment=Soldering Iron, Hot Air Station, Microscope
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| |Type=Soldering, BGA
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| |Difficulty=4. Specialist
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| }}
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| {{stub}}
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| == Problem description ==
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| <!--
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| Provide a concise description of the issue here. Be as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing.
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| iPhone 15 Pro that is not charging. It says it is at 1% battery level & doesn't go up. The USB meter is constantly fluctuating. When you plug in the charging cable, it pops up as 0% remaining.
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| It also restarts every 3 minutes due to lack of battery data. The panic log error will be 0xa1.
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| Even with a new battery and charging port installed, the symptoms will remain the same.
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| This tends to happen when the phone gets water damaged & fries the PMIC.
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| [[File:15 Pro 0xa1 Panic Log.png|alt=15 Pro 0xa1 Panic Log Example|thumb|Figure 1 - iPhone 15 Pro 0xa1 Panic Log Example]]
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| == Symptoms ==
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| <!--
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| Detail all measurable or observable symptoms in this section.
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| * Not Charging at 9V
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| * USB Meter is fluctuating
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| * Always reads battery at 1%
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| * When plugging in the charger, it says 0% remaining
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| * Restarts every 3 minutes
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| * Panic Log Error code is 0xa1 (Figure 1)
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| == Solution ==
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| === Diagnostic Steps ===
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| # Test with known good parts. Specifically battery & charging port
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| # Check the battery connector for damage. The pins should all be straight & not bent, warped or missing
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| # Check the connector '''Diode Mode Values''': ZXW Pin 1: 0.439V I2C2_SMC_CHARGER_BI_GG_SDA_1V8 ZXW Pin 2: 0.548 I2C2_SMC_CHARGER_TO_GG_SCL_1V8_CONN ZXW Pin 5: OL ANALOG_BATT_VCELL_NEG_CONN ZXW Pin 6: 0.505V ANALOG_BATT_VCELL_POS_CONN [[File:IPhone 15 Pro FPC Connector Diode Mode Values.png|center|thumb|iPhone 15 Pro FPC Connector Diode Mode Values]]
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| # Check the '''voltage''' of the battery connector pins, by connecting the board only, with charging port flex. Then plug in the charger to it & measure each pin: ZXW Pin 1: 1.5V I2C2_SMC_CHARGER_BI_GG_SDA_1V8 ZXW Pin 2: 1.8V I2C2_SMC_CHARGER_TO_GG_SCL_1V8_CONN ZXW Pin 5: 0.6V ANALOG_BATT_VCELL_NEG_CONN ZXW Pin 6: 0.6V ANALOG_BATT_VCELL_POS_CONN[[File:IPhone 15 Pro Board & Charging Port.png|center|thumb|iPhone 15 Pro Board & Charging Port. How to measure the voltage at the battery connector]]<br />
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| === Repair Steps ===
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| If you have a bad diode mode reading or low voltage on the battery connector, it's likely PMIC that has failed.
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