When installing a CB, ham radio or car phone in your vehicle, be sure to observe the following precautions; otherwise, the new equipment may adversely affect the engine control system and other electronic parts.
WARNING
Some jurisdictions prohibit the use of cellular phones while driving.
CAUTION
NissanConnectSM Mobile Apps (if so equipped)This vehicle is equipped with Smartphone Integration technology. This allows many compatible Smartphone applications to be displayed and easily controlled through the vehicle's touchscreen. NOTE: ...

WARNING Use a phone after stopping your vehicle in a safe location. If you have to use a phone while driving, exercise extreme caution at all times so full attention may be given to vehicl ...
Compression pressure
Inspection
Warm up engine and then turn it off.
Release fuel pressure.
Remove ignition coil and spark plug from each cylinder.
Connect engine tachometer (not required in use of CONSULT).
Install compression gauge (B) with an adapter (A) (commercial
service tool) onto spark plug hole.
...
Power supply and ground circuit
Diagnosis Procedure
1.CHECK GROUND CONNECTION
Turn ignition switch OFF.
Check ground connection E. Refer to Ground Inspection in GI, "Circuit
Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ECM G ...