Classification:

Reference:

Date:

KS15-025D

ITB15-026D

June 7, 2021

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 – 2021 Q50 (V37)
2015 – 2018 Q50 Hybrid (HV37)
2017 – 2021 Q60 (CV37)
2015 – 2019 Q70 (Y51)
2015 – 2018 Q70 Hybrid (Y51)
2015 – 2017 QX50 (J50)

2019 – 2021 QX50 (J55)
2015 – 2020 QX60 (L50)
2015 – 2019 QX60 Hybrid (L50H)
2015 – 2017 QX70 (S51)
2015 – 2021 QX80 (Z62)

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. Updates can be performed
through ASIST / Specialty Tools / Signal Tech-II.

Up/down arrows
OK button
ON/OFF button

Figure 1

Infiniti 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 Infiniti retailer to determine if this
applies to your vehicle.
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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.

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

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

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QX60 (example)
5. Select (highlight) model year range, and then
press OK.

2013-20

Figure 5

6. When Figure 6 is displayed, read the on-screen
message and then press OK.
NOTE: On-screen instructions will aid in
completing the Intelligent Key battery test.

7. Press the Intelligent Key lock button 3 times:

Figure 6

1st press – wait one second

I-Key Battery Test

2nd press – wait one second
3rd


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

Read 1
Read 2
Read 3
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.

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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 Weak, replace battery
Press OK to Continue

Battery OK
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 DLK – 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.

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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

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ITB15-026D

13. Gently rotate the screwdriver until the two covers separate.

Gently rotate
screwdriver
Top
Top cover

Bottom
Bottom cover
Figure 13

Figure 14

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

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.

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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.

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

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

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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

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PARTS INFORMATION
Description
Intelligent Key Battery

PART #
(1)

Quantity
1

(1) Use the VIN and the electronic parts catalog 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
RX5CAA

SYM
ZE

DIAG
32

FRT
0.2

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

AMENDMENT HISTORY
PUBLISHED DATE

REFERENCE

DESCRIPTION

September 10, 2015

ITB15-026

Original bulletin published

July 22, 2016

ITB15-026A

Changes made throughout

October 9, 2018

ITB15-026B

APPLIED VEHICLES updated

March 16, 2021

ITB15-026C

Classification number updated

June 7, 2021

ITB15-026D

APPLIED VEHICLES revised

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