ITB18-042a

Classification:
Reference:
Date:
AN18-027a
ITB18-042a
February 10, 2021
2013 M AND 2014-2017 Q70;
WHISTLE NOISE TRANSMITTED TO CALL RECIPIENT
WHEN USING BLUETOOTH® HANDS-FREE PHONE FEATURE
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.
APPLIED VEHICLES: 2013 M37 and M56 (Y51)
2013 M35 Hybrid (Y51)
2014-2017 Q70 (Y51)
2014-2017 Q70 Hybrid (Y51)
IF YOU CONFIRM
While using the Bluetooth® Hands-Free Phone Feature:

The call recipient (the person receiving the phone call) hears a whistle noise through their phone’s
speaker during the call.

The whistle noise is not heard by the call sender (Infiniti customer) during the call.

The whistle noise increases when the engine RPM of the call sender’s vehicle is raised.
ACTION
Repair the related electrical harness wiring at the Telematics Control Unit (TCU).
IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing. You
MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully
completing this repair.
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
1.
Turn the ignition switch OFF.
2.
Remove the instrument lower cover RH.

Pull downward and disengage fixing pawl and
metal clips.
: Pawl
: Metal clip
Figure 1
3.
Disconnect foot lamp RH harness connector.
Foot lamp RH
connector
TCU
Figure 2
Foot lamp RH
connector
Figure 3
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ITB18-042a
4.
Disconnect the TCU’s 40 pin connector, M216.
TCU
40 pin
connector
M216
Figure 4
5.
Open the foam and corrugated cover to gain
access to the harness.

2 inches
Separate 2 inches of the foam and
corrugated cover away from connector M216.
Harness side
of pin
Pin 20
20
Harness side
of Pin
pin 23
Figure 5
6.
TCU connector
M216
Locate black wire in pin 20 and pin 23 in TCU
connector M216.
NOTE: View is from harness side (rear) of
connector M216.
Figure 6
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ITB18-042a
7.
Measure 1 inch from M216 and cut both black
wires going ONLY to pins 20 and 23.
Cut here
Cut here
1 inch
Figure 7
8.
Strip ½ inch of insulation from the harness side
of both wires.
Strip ½ inch
Strip ½ inch
Figure 8
9.
Twist the stripped pair of wires together.
Twist
Figure 9
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ITB18-042a
10.
Install a Solder Sleeve Connector onto the
twisted wire pair.

Solder Sleeve
Connector
Solder Sleeve Connector is listed in the
PARTS INFORMATION section of this
bulletin.
Figure 10
Solder Sleeve Connector Instructions
11.
Slide a Solder Sleeve Connector over the
stripped and twisted pair of wires.
Solder Sleeve
Connector
Stripped wires
Figure 11
12.
Position the Solder Sleeve Connector so that
the solder ring (in the Solder Sleeve
Connector) is centered around the exposed
twisted wire area.
Exposed twisted wires
Adhesive ring
Adhesive ring
Solder ring
Solder Sleeve
Connector
Figure 12
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ITB18-042a
13.
Use the special Flameless Heat Gun—J-46538
to heat the Solder Sleeve Connector.
Solder
Sleeve
Solder
Sleeve
Connector
Connector
WireWire
This operation will:

Melt the solder (silver ring inside the Solder
Sleeve Connector) into the exposed twisted
wire area.

Melt the sealant (red rings inside Solder
Sleeve Connector) onto the wires.

Flame-Less
Heat
Gun
Flame-less
heat gun
Shrink the plastic sleeve onto the wires.
TP030545
Figure 13
NOTE: Tool J-46538 can be purchased from TECH-MATE at 1-800-662-2001.
Important Soldering Tips:
 Position the Solder Sleeve Connector in the middle of the heat shield (of the Heat Gun).
 Start heating the Solder Sleeve Connector from the center and move back and forth (side to side) and around to allow
even distribution of the heat to the entire Solder Sleeve Connector.
 Make sure the solder completely flows into the exposed twisted wires and the adhesive properly seals the wire
insulation to the Solder Sleeve Connector sleeve. Stop applying the heat immediately after this happens.
WARNING:
 The Flame-Less Heat Gun and the Solder Sleeve Connector becomes HOT during the soldering process.
 Allow the Gun and Solder Sleeve Connector to cool down before handling them.
CAUTION: Be careful not to damage the Solder Sleeve Connector or wires with the heat gun:
 Do NOT apply heat for more than about 40 seconds.
 Do NOT overheat the Solder Sleeve Connector or wires (i.e., severe darkening of Solder Sleeve Connector or wire
insulation).
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ITB18-042a
14.
Individually tape the 2 cut wires coming out of
connector M216.
Figure 14
15.
Fold the Solder Sleeve Connector up towards
the harness.
Solder Sleeve
Connector
Figure 15
16.
Tape the Solder Sleeve Connector, corrugated
cover, and foam back onto the harness.

Use 3M/Scotch Professional Grade Vinyl
Super 88 Electrical Tape ( ¾” wide) or
equivalent.
Figure 16
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ITB18-042a
17.
Reconnect connector M216 to the TCU.
18.
Reconnect foot lamp RH harness connector.
19.
Install the instrument lower cover RH.

Push upward to engage fixing pawl and metal
clips.
: Pawl
: Metal clip
Figure 17
PARTS INFORMATION
DESCRIPTION
Terminal – Joint
(Solder Sleeve Connector Connector)
PART NUMBER
QUANTITY
24361 – 7990A
1
3M/Scotch Professional Grade
Vinyl Super 88 Electrical Tape (
¾” wide) or equivalent (1)
(1) This item is available at many local auto supply and hardware stores.
Electrical Tape
Shop Supply
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
Repair TCU Harness
PFP
23461-7990A
OP CODE
RX6XAA
SYM
ZE
DIA
32
FRT
0.3
AMENDMENT HISTORY
PUBLISHED DATE
REFERENCE
DESCRIPTION
November 26, 2018
ITB18-042
Original bulletin published
February 10, 2021
ITB18-042a
Classification number updated
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ITB18-042a