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RM-701
BB Troubleshooting and Manual Tuning Guide
Keyboard troubleshooting
Keyboard troubleshooting
Troubleshooting flow
Sensors troubleshooting
Accelerometer troubleshooting
Accelerometer Self Test can verify the sensor functionality completely. It verifies that the sensor can
communicate with the engine and that healthy data is available from all 3 axes.
The component's logic circuitry is tested by reading the manufacturer ID from the sensor register. Interrupt/
Data Ready signal is also tested by forcing it to change state during the self test.
The component's sensor element functionality is tested with two measurements. The first measurement is
for a static (no movement) situation and the second measurement is made when sensor elements are
deflected using the sensor's internal self test function. The difference between these two measurements is
then compared to the inbuilt limits in the self test code of the phone. Note that if the phone is not stable
during the self test, the test may fail because the first measurement is not for a static situation as it should.
If the self test result is 'No response', the engine cannot communicate with the sensor. The magnetometer
and proximity sensors share the same supply voltage and I2C bus with the accelerometer. You can use both
Magnetometer Test and DiPro Test to rule out the possibility that power supplies are broken (VAUX 2.8V &
VIO 1.8V) or that the I2C bus is not working on the engine side. Additionally, if INT1 signal path is broken,
the self test will fail with the result 'No response'. If the Accelerometer Self Test fails and some other self test
passes, change the accelerometer and retest.
If the self test result is 'Minor', the sensor element self test has failed and a pop-up window will open
automatically. Change the sensor and retest. Error details can be identified from Detailed Result. The last 3
bytes (in hexadecimal form) indicate the difference between the above mentioned two measurements for
Issue 1
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Table of Contents
Troubleshooting
