Classification:

Reference:

KS15-024C

Date:

NTB15-077C

March 16, 2021

NISSAN; SIGNAL TECH-II
INTELLIGENT KEY BATTERY TEST AND SIGNAL CHECK
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.

APPLIED
VEHICLES:

2015 – 2018 Altima (L33)
2019 Altima (L34)
2018 – 2019 Armada (Y62)
2015 – 2017 LEAF (ZE0)
2018 – 2019 LEAF (ZE1)
2015 – 2018 Murano (Z52)
2016 Murano Hybrid (Z52)
2016 – 2018 Maxima (A36)
2015 – 2019 Pathfinder (R52)

2015 Pathfinder Hybrid (R52)
2015 – 2017 Quest (E52)
2015 – 2018 Rogue (T32)
2017 – 2019 Rogue Hybrid (T32)
2015 – 2019 Sentra (B17)
2016 – 2019 Titan XD (A61)
2015 – 2019 Versa (N17)
2015 – 2019 Versa Note (E12)

IF YOU CONFIRM
The Intelligent Key intermittently or continuously does not function.

ACTION
Check the battery condition with the Signal Tech-II “I-Key Battery Test.”
IMPORTANT: Confirm that the Signal Tech-II has the most recent update. Update can
be performed through ASIST / Specialty Tools / Signal Tech-II.

Up/down arrows
OK button

ON/OFF button

Figure 1
Nissan Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are
properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job
properly and safely. NOTE: If you believe that a described condition may apply to a particular vehicle, DO
NOT assume that it does. See your Nissan dealer to determine if this applies to your vehicle.
1/9

SERVICE PROCEDURE
Intelligent Key Battery Condition Check
1. Turn ON the Signal Tech-II (see Figure 1 on page 1).

NOTE: This procedure will refer to the yellow up/down arrows and OK button on the
Signal Tech-II key pad. Refer to Figure 1 on page 1 as needed.

2. Using the Signal Tech-II key pad; scroll to
Toolkit with the yellow arrows and then
press OK.

Main Menu
TPMS Check
Toolkit
Active Sensor
Other Brands
Unknown Selection
Settings
Figure 2

Toolkit
3. Scroll to I-Key Battery Test, and then
press OK.

Car/Key Signals Test
I-Key Battery Test
Engine DTC Check
Figure 3

4. Scroll to (highlight) the model you are
working on, and then press OK.

I-Key Battery Test
Pathfinder
QX60
JX35
Rogue
Q50
Murano
Figure 4

2/9

NTB15-077C

Pathfinder (example)
5. Select (highlight) model year range, and
then press OK.

2013-19

Figure 5

6. When Figure 6 is displayed, read the onscreen message and then press OK.

NOTE: On-screen instructions will aid in
completing the Intelligent Key battery
test.

Figure 6
7. Press the Intelligent Key lock button 3
times:

I-Key Battery Test

1st press – wait one second
2nd press – wait one second

Read 1
Read 2
Read 3

3rd press – wait one second


A check mark will appear next to
Read 1, 2, and 3 with each press of
the lock button.

Press the lock button on
the I-Key and please wait…
Figure 7

NOTE:


In some rare cases the Intelligent Key battery may be too weak to transmit or the
Intelligent Key may no longer function; check marks will not appear next to Read
1, 2, or 3.



In this case, go to Manual Battery Voltage Test on page 5.

3/9

NTB15-077C

8. When step 7 is complete, the message in Figure 8 or Figure 9 will display.

I-Key Battery Test

I-Key Battery Test

Battery OK
Press OK to Continue

Battery Weak, replace
battery
Press OK to Continue

Figure 8

Figure 9

9. If the message displayed is:


Battery OK Press OK to Continue
 The battery is OK and does not need to be replaced.
 Refer to the Electronic Service Manual (ESM), section Door & Lock for further
diagnosis.



Battery Weak, replace battery Press OK to Continue
 Replace the Intelligent Key battery.
 Measure old battery’s voltage with a DVOM and write the voltage on the repair
order.
 Perform steps 6 – 8 on pages 3 – 4 again.

4/9

NTB15-077C

Manual Battery Voltage Test
10. Remove the mechanical key from the Intelligent Key.
11. Place a piece of tape on the end of a small flathead screwdriver.
12. Gently insert the screwdriver into one of the slots shown in Figure 10 and Figure 11.

Slots for screwdriver

Figure 10

Figure 11

NOTE:


Figure 10 and Figure 11 show the proper location to insert a tool to open the
Intelligent Key.



DO NOT insert a tool into the notches on the side of the Intelligent Key (if equipped)
to pry it open, as this may damage the printed circuit board.



DO NOT use excessive force when opening the Intelligent Key, as this may result in
damage to the internal components.

Do not use excessive force
(Example of damage to internal
components shown.)

Figure 12

5/9

NTB15-077C

13. Gently rotate the screwdriver until the two covers separate (Figure 13 and Figure 14).

Gently rotate
screwdriver
Top
cover
Top

Bottom
cover
Bottom
Figure 14

Figure 13

14. Remove the battery and check the voltage.
Two methods can be used:
Check voltage with resistor (load test)

Check voltage without resistor

Refer to the ESM for Intelligent Key
battery diagnosis procedure.

If a resistor is unavailable, use a
volt/ohm meter (VOM) to check the
battery voltage.



If battery voltage is not within the
2.5 – 3.0 range, replace battery.



NOTE: When inserting the new
battery, make sure the + side of
the battery faces the bottom cover
piece.


If battery voltage is within the
2.5 – 3.0 range, refer to the ESM
for further diagnostic information.

If the battery voltage is 2.7 or less,
replace the battery.
NOTE: When inserting the new
battery, make sure the + side of
the battery faces the bottom cover
piece.



If the battery voltage is more than
2.7, refer to the ESM for further
diagnostic information.

15. Reattach the two cover pieces by pushing them together.

16. Confirm all Intelligent Key functions operate correctly.
6/9

NTB15-077C

Intelligent Key Frequency Check


The frequency of the Intelligent Key signal may be 315 MHz or 433/434 MHz.



For diagnostic purposes, sometimes TECH LINE or other Nissan technical staff will
ask for the frequency (315 MHz or 433/434 MHz) of an Intelligent Key you are
working on.



The following steps can be used to check the signal frequency.

1. Turn ON the Signal Tech-II.

2. Using the Signal Tech-II key pad; scroll to
Toolkit with the yellow arrows and then
press OK.

Main Menu
TPMS Check
Toolkit
Active Sensor
Other Brands
Unknown Selection
Settings
Figure 15

Toolkit
3. Scroll to Car/Key Signals Test, and then
press OK.

Car/Key Signals Test
I-Key Battery Test
Engine DTC Check
Figure 16

7/9

NTB15-077C

4. Hold the Intelligent key near the Signal Tech-II and press the Lock or Unlock button.

5. The signal strength and frequency (315 MHz or 433/434 MHz) will be displayed.

Figure 17

8/9

NTB15-077C

PARTS INFORMATION
DESCRIPTION
Intelligent Key Battery

PART #
(1)

QUANTITY
1

(1) Use the VIN and the electronic parts catalog (FAST or equivalent) to look up the part
number for the vehicle you are working on.

CLAIMS INFORMATION
Submit a Primary Failed (PP) type line claim using the following claims coding:
OPERATION
Perform I-Key Battery Test with Signal Tech-II

PFP
(2)

OP CODE SYM DIAG FRT
RX5CAA
ZE
32
0.2

(2) Reference the electronic parts catalog (FAST or equivalent) and use the Intelligent Key
battery Part Number as the Primary Failed Part.

AMENDMENT HISTORY
PUBLISHED DATE

REFERENCE

September 10, 2015

NTB15-077

Original bulletin published

July 22, 2016

NTB15-077A

Changes made throughout

October 9, 2018

NTB15-077B

APPLIED VEHICLES updated

March 16, 2021

NTB15-077C

Classification number updated

9/9

DESCRIPTION

NTB15-077C