Classification:

Reference:

Date:

EC20-025

ITB20-027

December 1, 2020

PERMANENT DTC SET IN TCM AND WILL NOT ERASE
APPLIED VEHICLES:

2019 QX50 (J55)

IF YOU CONFIRM
One or more of the following DTCs are stored in the permanent DTC screen (Figure 1):
P0715, P0716, P0718, P0730, P0791, P0793, P0794, P1722, P1742, P1745, P17F0, P17F1, P2766
And
The DTCs will not erase when following the ESM procedure.
NOTE:


If DTCs other than those listed above are stored, this bulletin does not apply.

Figure 1
ACTION
Replace 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
1.

Replace the TCM with a new, blank, TCM.


For TCM replacement, refer to the Electronic Service Manual (ESM), section TRANSMISSION &
DRIVELINE > TRANSAXLE & TRANSMISSION > CVT: GE0F10A > REMOVAL AND
INSTALLATION > TCM.

NOTE: Before replacing the TCM, be sure to save the TCM data on CONSULT before removing the
TCM.
Obtain VIN Specific Configuration
2.

Open the EPC and type in the VIN.

3.

Select F POWER TRAIN.

XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXX

Figure 2

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4.

Select 310 AUTO TRANSMISSION, TRANSAXLE & FITTING.

XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX

Figure 3
5.

Select part 31039 ROM DATA-AUTO TRANS.

XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX

31039 ROM DATA-AUTO TRANS
Figure 4

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6.

Select the correct TCM ROM by clicking on the blue CONSULT button that corresponds to the vehicle’s
production date.

XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX

Production dates

CONSULT button
Figure 5

7.

Load the CSV file onto a thumb drive.


After selecting the blue CONSULT button in step 6, a screen showing your computer’s desktop with
the CSV file should display (see Figure 6, this is the VIN specific configuration file).



Do not change the file name or the file type.



Load/save this CSV file onto a thumb drive.

NOTE: It is recommended, at the start, that the thumb drive be blank; all other files erased. This will
make it easier to find the file later in this procedure.

Example
XXXXXXXXXXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXXXXX

Do not change the
file name or the file
type
Figure 6
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ITB20-027

8.

Plug the thumb drive (with the configuration file) into the CONSULT PC.

Thumb drive with the
configuration file

Figure 7
Configure the New TCM
IMPORTANT: Before starting, make sure:


ASIST on the CONSULT PC has been synchronized (updated) to the current date.



All C-III plus software updates (if any) have been installed.



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 rises above 15.5V during reprogramming, the TCM
may be damaged.



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



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, reprogramming may be interrupted and the TCM may be damaged.

NOTE: The following steps are to be performed after the TCM has been replaced.

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9.

Connect a battery maintainer or smart charger to the vehicle.

10.

Connect the VI to the vehicle.

11.

Turn the ignition ON.

12.

Open / start C-III plus.

13.

Wait for the VI to be recognized.


14.

The serial number will display when the VI is recognized.

Select Re/programming, Configuration.

VI is
recognized

Figure 8

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15.

Check the box to confirm the precaution instructions have been read, and then select Next.
NOTE: Use the arrows (if needed) to view and read all the precautions.

Figure 9
16.

If the screen in Figure 10 displays, select Automatic Selection(VIN).


If the screen in Figure 10 does not display, skip to step 17 on page 8.

Figure 10

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17.

Confirm the VIN or Chassis # matches the vehicle’s VIN, and then select Confirm.

XXXXXXXXXXXXX
XXX
XXX

Figure 11
18.

Select Confirm.

XXXXXXXXXXXXXXXXXX

Figure 12

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19.

Select TRANSMISSION.

Figure 13
20.

Select After ECU Replacement, under Programming (Blank ECU).

Figure 14

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21.

Select EPC linked.

Figure 15
22.

Select File Selection.

EPC

XXXXXXXXXXXXXX

Figure 16

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23.

Navigate your CONSULT PC to the thumb drive and select the configuration file (see example in Figure
17).


This will be the file that was loaded onto the thumb drive in step 7 on page 4.

NOTE:

24.



Navigating a computer to a file on a thumb drive is a common function, but can vary depending on
the thumb drive and the individual computer set up.



If you are unsure how to navigate to the file on your thumb drive, ask an associate in your shop who
is more familiar with this process.

Select Open.

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX