Classification:

Reference:

AT23-004

Date:

ITB23-022

July 11, 2023

DTC P0744 STORED IN THE TCM
APPLIED VEHICLES:

2017-2020 Q50 (V37)
2017-2020 Q60 (CV37)

IF YOU CONFIRM
DTC P0744 (TORQUE CONVERTER) is stored as PAST or CURRENT in the TCM.

ACTION
Follow the SERVICE PROCEDURE in this bulletin to 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.
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.

Using CONSULT-III, confirm the current TCM part number and write it on the repair
order.


If it matches one of the part numbers in Table 1, continue to step 2 below.



If it does not match one of the part numbers in Table 1, this bulletin does not
apply. Go back to ASIST for further diagnostic and repair information.

Table 1
MODEL

Q50, Q60

CURRENT TCM PART NUMBER: 3103975X0A, 75X0E
75X1B, 75X1E
75X6C, 75X6E
75X7A, 75X7C
X032C, X032D, X032E
X033A, X033B, X033C, X033D, X033E
X062E
X063A
X065A, X065B, X065C, X065D
X066A, X066B, X066C, X066D
X072E
X073A, X073B, X073C
X074D, X074E
X322A, X322B, X322C, X322D

Perform the following before starting the reprogramming procedure to prevent damage to
the control unit.
 Connect the AC Adapter to the CONSULT PC.
 Connect the CONSULT PC to the Internet via Wi-Fi or a network cable.
 Ensure ASIST on the CONSULT PC has been synchronized (updated) to the
current date and all CONSULT software updates (if any) have been installed.
 Turn OFF all external Bluetooth® devices (e.g., cell phones, printers, etc.) within
range of the CONSULT PC and the VI. If Bluetooth® signal waves are within range
of the CONSULT PC or VI during reprogramming, the reprogramming may be
interrupted.
 Turn the hazard warning lamps ON.
o Turn OFF all other vehicle electrical loads such as exterior lights, interior lights,
HVAC, blower, rear defogger, audio, NAVI, seat heater, steering wheel heater,
etc. If electrical loads remain ON, the TCM may be damaged.
 Connect a battery maintainer or smart charger, set to reflash mode or a similar
setting, to ensure the battery voltage stays between 12.0 V and 15.5 V.
2.

Reprogram the TCM.
HINT: If you are not familiar with the reprogramming procedure, click here. This will
link you to the "CONSULT REPROGRAMMING FOR ENGINE OR TRANSMISSION
CONTROL MODULE (ECM OR TCM)" general procedure.

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ITB23-022

3.

After completing Erase All DTCs, print a copy of the CONSULT screen showing
the before and after part numbers of the control unit and attach it to the repair order.

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

(1)
(2)

DESCRIPTION

PFP

OP CODE

SYM

DIA

FRT

Reprogram A/T Control Unit (TCM)

(1)

JE99AA

ZE

32

(2)

Reference the electronic parts catalog and use the Control Valve Assy (31705-*****)
as the Primary Failed Part (PFP).
Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat
Rate Time (FRT).

AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
July 11, 2023

ITB23-022

DESCRIPTION
Original bulletin published

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ITB23-022