Classification:

Reference:

Date:

EL18-027

ITB18-042

November 26, 2018

2013 M AND 2014-2017 Q70;
WHISTLE NOISE TRANSMITTED TO CALL RECIPIENT
WHEN USING BLUETOOTH® HANDS-FREE PHONE FEATURE
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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ITB18-042

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

TCU connector
M216

6. 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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ITB18-042

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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ITB18-042

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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ITB18-042

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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ITB18-042

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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ITB18-042

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
Electrical Tape
Vinyl Super 88 Electrical Tape (
¾” wide) or equivalent (1)
(1) This item is available at many local auto supply and hardware stores.

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
November 26, 2018

REFERENCE
ITB18-042

DESCRIPTION
Original bulletin published

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ITB18-042