Precautions For Removing Battery Terminal

WARNING: This page is about a different car, the 2016 Infiniti QX50. However, it is still accessible from the selected car via links, so may be relevant.

When disconnecting the battery terminal, pay attention to the following.

Always use a 12V battery as power source.
Never disconnect battery terminal while engine is running.
When removing the 12V battery terminal, turn OFF the ignition switch and wait at least 30 seconds.

Courtesy of NISSAN NORTH AMERICA, INC.

For vehicles with the engine listed below, remove the battery terminal after a lapse of the specified time:

D4D engine	: 20 minutes	YS23DDT	: 4 minutes
HRA2DDT	: 12 minutes	YS23DDTT	: 4 minutes
K9K engine	: 4 minutes	ZD30DDTi	: 60 seconds
M9R engine	: 4 minutes	ZD30DDTT	: 60 seconds
R9M engine	: 4 minutes
V9X engine	: 4 minutes
YD25DDTi	: 2 minutes

NOTE:

ECU may be active for several tens of seconds after the ignition switch is turned OFF. If the battery terminal is removed before ECU stops, then a DTC detection error or ECU data corruption may occur.

After high - load driving, if the vehicle is equipped with the V9X engine, turn the ignition switch OFF and wait for at least 15 minutes to remove the battery terminal.
NOTE:
- Turbocharger cooling pump may operate in a few minutes after the ignition switch is turned OFF.
- Example of high - load driving
  - Driving for 30 minutes or more at 140 km/h (86 MPH) or more.
  - Driving for 30 minutes or more on a steep slope.
For vehicles with the 2 - batteries, be sure to connect the main battery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of main battery and sub battery disconnected, then DTC may be detected.
After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.
NOTE:
The removal of 12V battery may cause a DTC detection error.