Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The Signal Tech II Tool (J-50190) can be used to test the remote keyless entry keyfob relative signal strength. Refer to the Signal Tech II User Guide for additional information.

CHECK KEYFOB FUNCTION
Check keyfob function using Signal Tech II Tool J-50190 or Remote Keyless Entry Tester J-43241 (shown).

Does the test pass?

YES: Key fob is OK.

NO: GO TO 2

Fig 1: Identifying Remote Keyless Entry Tester J-43241
Courtesy of NISSAN NORTH AMERICA, INC.
CHECK KEY FOB COMPONENTS
1. Open the lid using a coin.
  CAUTION:
  - Do not touch the circuit board or battery terminal.
  - The keyfob is water-resistant. However, if it does get wet, immediately wipe it dry.
2. Remove the key fob battery.
  CAUTION:
  - Keep dirt, grease, and other foreign materials off the electrode contact area.
3. Visually inspect keyfob internal components.
  Is the inspection result normal?
  
  YES: GO TO 3
  
  NO: Repair or replace malfunctioning parts.
  
  Fig 2: Removing Key Fob Battery By Opening Lid Using Coin
  Courtesy of NISSAN NORTH AMERICA, INC.
CHECK KEY FOB BATTERY
Check by connecting a resistance (approximately 300Ω) so that the current value becomes about 10 mA.

Standard: Approx. 2.5 - 3.0V

Is the measurement value within specification?

YES: Key fob battery is OK. Check remote keyless entry receiver. Refer to "COMPONENT FUNCTION CHECK ".

NO: GO TO 4

Fig 3: Checking Intelligent Key Battery
Courtesy of NISSAN NORTH AMERICA, INC.
REPLACE KEY FOB BATTERY
1. Replace the key fob battery, positive side down.
2. Align the tips of the upper and lower parts, and then push them together until it is securely closed.
  CAUTION:
  - When replacing battery, keep dirt, grease, and other foreign materials off the electrode contact area.
3. After replacing the battery, check that all key fob functions work properly.
  Is the inspection result normal?
  
  YES: Key fob is OK.
  
  NO: Check remote keyless entry receiver. Refer to "COMPONENT FUNCTION CHECK ".
  
  Fig 4: Replacing Key Fob Battery
  Courtesy of NISSAN NORTH AMERICA, INC.