Classification:

Reference:

Date:

EM19-007

ITB19-021

August 23, 2019

2019 QX50; DRIVE BELT CHIRP NOISE
APPLIED VEHICLE: 2019 QX50 (J55)

IF YOU CONFIRM
The drive belt makes a chirp type noise when accelerating the vehicle and/or revving the engine in Park.

ACTION
Compare the vehicle’s ECM and TCM part numbers with those listed in TABLE A and TABLE B, respectively,
in this bulletin.


If there is a match, reprogram the ECM.



If there is a match, also reprogram the TCM.

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
ECM Reprogramming
IMPORTANT: Before starting the reprogramming procedure, make sure:




ASIST on the CONSULT PC has been synchronized (updated) to the current date.
All CONSULT-III plus (C-III plus) software updates (if any) have been installed.
The CONSULT PC is connected to the Internet (Wi-Fi or cable).

HINT:


If you are not familiar with the reprogramming procedure, click here. This will link to the "CONSULT-III
PLUS (C-III PLUS) ECM or TCM Reprogramming" general procedure.



Take the vehicle for a 10 minute drive in order to meet the following Idle Air Volume Learn (IAVL)
conditions:
 Engine coolant temperature: 70-100°C
(158-212°F)
 Battery voltage: More than 12.9V (At idle)
 Transmission: Warmed up



After reprogramming is complete, it is required to perform
Throttle Valve Closed Position, Idle Air Volume Learn,
Accelerator Closed Position, and DTC Erase.
Figure 1



Connect a battery maintainer or smart charger set to reflash mode or a similar setting. If the
vehicle battery voltage drops below 12.0V or above 15.5V during reprogramming, the ECM may
be damaged.



Be sure to turn OFF all vehicle electrical loads. If a vehicle electrical load remains ON, the ECM
may be damaged.



Be sure to connect the AC Adapter. If the CONSULT PC battery voltage drops during
reprogramming, the process will be interrupted and the ECM may be damaged.



Turn OFF all external Bluetooth® devices (e.g., cell phones, printers, etc.) within range of the
CONSULT PC and the plus VI. If Bluetooth® signal waves are within range of the CONSULT PC
and the plus VI during reprogramming, reprogramming may be interrupted and the ECM may be
damaged.

1. Using C-III plus, confirm the current ECM part number and write it on the repair order.


If it matches one of the part numbers in Table A (next page), reprogram the ECM, and then confirm if
the TCM needs to be reprogrammed (see TCM Reprogramming on the next page).



If it does not match any of the part numbers in Table A, go to TCM Reprogramming on the next page.

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ITB19-021

Table A
CURRENT ECM PART NUMBER: 23710 –
5NC0D, 5NC1D, 5NC2D, 5NC3D,
5NC0E, 5NC1E, 5NC2E, 5NC3E,
5NE0A, 5NE1A, 5NE2A, 5NE3A,
5NE0B, 5NE1B, 5NE2B, 5NE3B,
5NE0C, 5NE1C, 5NE2C, 5NE3C,
5NE0D, 5NE1D, 5NE2D, 5NE3D,
5NE0E, 5NE1E, 5NE2E, 5NE3E,
5NF0B, 5NF1B, 5NF2B, 5NF3B,
5NF0C, 5NF1C, 5NF2C, 5NF3C,
5NL0A, 5NL1A, 5NL2A, 5NL3A,
5NL0B, 5NL1B, 5NL2B, 5NL3B,
5NL0C, 5NL1C, 5NL2C, 5NL3C,
5NL0D, 5NL1D, 5NL2D, 5NL3D,
5NL0E, 5NL1E, 5NL2E, 5NL3E,
2.

5NC4D,
5NC4E,
5NE4A,
5NE4B,
5NE4C,
5NE4D,
5NE4E,
5NF4B,
5NF4C,
5NL4A,
5NL4B,
5NL4C,
5NL4D,
5NL4E,

5NC5D, 5NC6D, 5NC7D, 5NC8D
5NC5E, 5NC6E, 5NC7E, 5NC8E
5NE5A, 5NE6A, 5NE7A, 5NE8A
5NE5B, 5NE6B, 5NE7B, 5NE8B
5NE5C, 5NE6C, 5NE7C, 5NE8C
5NE5D, 5NE6D, 5NE7D, 5NE8D
5NE5E, 5NE6E, 5NE7E, 5NE8E
5NF5B, 5NF6B, 5NF7B, 5NF8B
5NF5C, 5NF6C, 5NF7C, 5NF8C
5NL5A, 5NL6A, 5NL7A, 5NL8A
5NL5B, 5NL6B, 5NL7B, 5NL8B
5NL5C, 5NL6C, 5NL7C, 5NL8C
5NL5D, 5NL6D, 5NL7D, 5NL8D
5NL5E, 5NL6E, 5NL7E, 5NL8E

After completing Erase ALL DTCs, print a copy of the C-III plus screen showing the before and after
ECM part numbers and attach it to the repair order.

TCM Reprogramming
HINT: C-III plus, the CONSULT PC, the AC adaptor, and the battery maintainer or smart charger should still be
connected to the vehicle. If not, make sure the items under IMPORTANT below have been applied.
IMPORTANT: Before starting the reprogramming procedure, make sure:



3.

ASIST on the CONSULT PC has been synchronized (updated) to the current date.
All CONSULT-III plus (C-III plus) software updates (if any) have been installed.
The CONSULT PC is connected to the Internet (Wi-Fi or cable).
Using C-III plus, confirm the current TCM part number and write it on the repair order.



If it matches one of the part numbers in Table B, reprogram the TCM.



If it does not match any of the part numbers in Table B, no further repairs are needed.

Table B
CURRENT TCM PART NUMBER: 310365NA0A, 5NA0B, 5NA0C, 5NA0D
4.

After completing Erase ALL DTCs, print a copy of the C-III plus screen showing the before and after
TCM part numbers and attach it to the repair order.

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ITB19-021

CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:

(1)
(2)
(3)

DESCRIPTION
PFP
OP CODE
SYM
DIA
FRT
Reprogram the ECM
(1)
DE97AA
ZE
32
(2,3)
Reference the Electronic Parts Catalog (EPC) and use the ECM part number (23703-*****) as the
Primary Failed Part (PFP).
Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat Rate Time (FRT).
FRT allows adequate time to access DTC codes and reprogram ECM. No other diagnostic procedures
subsequently required. Do NOT claim any Diagnostic Op Codes with this claim.

And if needed on the same repair line
DESCRIPTION
Reprogram the TCM

PFP
(1)

OP CODE
JE99AA

SYM
ZE

DIA
32

FRT
(2)

AMENDMENT HISTORY
PUBLISHED DATE

REFERENCE

August 23, 2019

ITB19-021

DESCRIPTION
Original bulletin published

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ITB19-021