Motorola Moto G 3rd Generation Troubleshooting Manual page 212

Magnetometer
There is one magnetometer IC (U6160) on the main PCB board.
In the event of a magnetometer failure:
• Inspect physical placement and orientation of U6160 and its related components on
main PCB board (see magnetometer schematic page on next slide)
• Ensure the magnetometer's glass package is not cracked (improper factory handling
could cause cracks since there's no shield over the magnetometer)
• Check power: MAG_VIO (1.8V) at U6160 pins B1 and C4
• Check for activity on the I2C interface (I2C_SCL_SENS_MSM and
I2C_SDA_SENS_MSM)
• Connect the board to a display and power the board/display with a battery or factory
cable. Launch the CQA app and test each accelerometer one at a time (CQA Menu
Mode -> Sensor -> Magnetometer). Look for magnetometer activity on all axis X,Y,Z.
As you move the board's orientation, the X,Y,Z accelerometer readings will change. Each
o
x,y,z axis for an ideal magnetometer IC will display its greatest positive value when that axis
is aligned with magnetic north. If no data is shown or the data isn't changing values, then the
IC may be faulty.
• Check the reset and interrupt lines, which are buried: MAG_RESET_N and
COMPASS_INT
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Moto G (3rd Generation)
TROUBLESHOOTING GUIDE