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USB Charging Issue
Ensure the device is not in factory mode. Ensure battery temperature reading is as expected
(between 20-30C). If the battery temperature reads cold (-20C), the NFC flex is disconnected
and the thermistor is not present. If the battery temperature reads hot (>60C), the thermistor
lines are shorted.
Inspect the battery for any damage or abuse. Ensure by measurement or from CQA battery info
menu that the battery pack voltage and cell plus sense voltage levels are according to the
expected charge current level.
There could be an issue with the USB connector or its connections to the board and the charge
IC. Measure VBUS (5V, or 9V for turbocharger), D+, D-, and ID (2V). Measure this at the
charger cable if possible or preferred at first, then on the PCB and, as needed, next to the
charge IC. See table below for expected turbocharger D+/D- levels.
If the ID voltage is low (mV), with 5V on VBUS with no charger connected, the device is in host
mode. When the device is in this mode, it will not charge. Measure the resistance of ID to GND.
If it is less than 100Kohms, there is a short to GND on the line. Replace VR502.
Moto X Force/DROID Turbo 2
MOTOROLA CONFIDENTIAL
BASEBAND TROUBLESHOOTING GUIDES
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Table of Contents
Troubleshooting
