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 perform the following functions. Refer to the Signal Tech II User Guide for additional information.

Check Intelligent Key relative signal strength
Confirm vehicle Intelligent Key antenna signal strength

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

Does the test pass?

YES: Intelligent Key is OK.

NO: GO TO 2

Fig 1: Identifying Remote Keyless Entry Tester J-43241
Courtesy of NISSAN NORTH AMERICA, INC.
CHECK INTELLIGENT KEY COMPONENTS
1. Release the lock knob at the back of the Intelligent Key and remove the mechanical key.
2. Insert a flat-blade screwdriver (A) wrapped with a cloth into the slit of the corner and twist it to separate the upper part from the lower part.
  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.
3. Remove the Intelligent Key battery.
  CAUTION:
  - Keep dirt, grease, and other foreign materials off the electrode contact area.
4. Visually inspect keyfob internal components.
Fig 2: Separating Upper Part From Lower Part Of Intelligent Key
Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: GO TO 3

NO: Repair or replace malfunctioning parts.
CHECK INTELLIGENT KEY 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: Intelligent Key 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 INTELLIGENT KEY BATTERY
1. Replace the Intelligent Key battery.
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 Intelligent Key functions work properly.
Is the inspection result normal?

YES: Intelligent Key is OK.

NO: Check remote keyless entry receiver. Refer to "COMPONENT FUNCTION CHECK ".

Fig 4: Replacing Intelligent Key Battery
Courtesy of NISSAN NORTH AMERICA, INC.