Nissan Armada 2025-2026 Service and Repair Manual: Precautions for Removing Battery Terminal

PRECAUTIONS FOR REMOVING BATTERY TERMINAL : Precautions

• When disconnecting the 12V battery terminal, turn off the ACC power before disconnecting the 12V battery terminal, observing “How to disconnect 12V battery terminal” described below.

  

  NOTE:

  Some ECUs operate for a certain fixed time even after ignition switch is turned OFF and ignition power supply is stopped. If the battery terminal is disconnected before ECU stops, accidental DTC detection or ECU data damage may occur.

• For Nissan Armada 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.

HOW TO DISCONNECT 12V BATTERY TERMINAL

Disconnect 12V battery terminal according to instruction described below.

1. Open the hood.

2. Turn ignition switch to the ON position.

3. Turn ignition switch to the OFF position with the driver side door opened.

4. Get out of the vehicle and close the driver side door.

5. Wait at least 3 minutes. For vehicle with the engine listed below, remove the battery terminal after a lapse of the specified time.

   BR08DE	: 4 minutes	R9N engine	: 12 minutes
   BR10DE	: 12 minutes	V9X engine	: 4 minutes
   D4D engine	: 20 minutes	YD25DDTi	: 2 minutes
   HR09DET	: 12 minutes	YS23DDT	: 4 minutes
   HR10DDT	: 12 minutes	YS23DDTT	: 4 minutes
   HR10DET	: 12 minutes	ZD30DDTi	: 60 seconds
   HR13DDT	: 12 minutes	ZD30DDTT	: 60 seconds
   HRA2DDT	: 12 minutes	K9K engine	: 4 minutes
   M9R engine	: 4 minutes	R9M engine	: 4 minutes

   CAUTION:

   While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of this caution results in the activation of ACC power supply according to the Auto ACC function.

6. Remove 12V battery terminal.

   CAUTION:

   After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

Service Notice or Precautions for Steering System

• Check the following item when performing the trouble diagnosis.

  • Check any possible causes by interviewing the symptom and it′s condition from the customer if any malfunction, such as power steering warning lamp is turned ON, occurs.

  • Check if air pressure and size of tires are proper, the specified part is used for the steering wheel, and control unit is genuine part.

  • Check if the connection of steering column assembly and steering gear assembly is proper (there is not looseness of mounting bolts, damage of rods, boots or sealants, and leakage of grease, etc).

  • Check if the wheel alignment is adjusted properly.

  • Check if there is any damage or modification to suspension or body resulting in increased weight or altered ground clearance.

  • Check if installation conditions of each link and suspension are proper.

  • Check if the 12V battery voltage is proper.

  • Check connection conditions of each connector are proper.

  • Before connecting or disconnecting the power steering control module harness connector, ignition switch “OFF” and disconnect 12V battery ground cable. Because 12V battery voltage is applied to power steering control module even if ignition switch is “OFF”.

  • When connecting or disconnecting pin connectors into or from power steering control module, take care not to damage terminals (bend or break).

• During quick steering, rasping noise may be heard from under the vehicle. This is not a malfunction. The noise is an operating noise of the EPS system under normal conditions. If the rasping noise occurs during slow steering, this may not be an operating noise of the system. In this case, it is necessary to find out the location of the noise and repair, if necessary.