ITB19-012

Classification:
Reference:
Date:
EC19-017
ITB19-012
May 3, 2019
2019 QX50; MIL ON WITH DTC P0448
APPLIED VEHICLE:
2019 QX50 (J55)
IF YOU CONFIRM
The Malfunction Indicator Light (MIL) is ON with DTC P0448 (EVAP canister vent control valve) stored.
ACTION
Reprogram the ECM, if applicable.
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
Reprogram the ECM
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).
NOTE:

If you are not familiar with the reprogramming procedure, click here. This will link you to the
"CONSULT- III plus (C-III plus) ECM 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, you will be required
to perform Throttle Valve Closed Position, Idle Air
Volume Learn, Accelerator Closed Position, and DTC
erase.
Figure A
CAUTION:

Connect the GR8 to the 12V battery and select ECM Power Supply Mode.
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 VI. If Bluetooth® signal waves are within range of the CONSULT PC
during reprogramming, reprogramming may be interrupted and the ECM may be damaged.
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ITB19-012
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, reprogram the ECM.

If it does not match any of the part numbers in Table A, this bulletin does not apply. Go back to ASIST
for further diagnostic and repair information.
Table A
MODEL
CURRENT ECM PART NUMBER: 237105NE0A, 5NE1A, 5NE2A, 5NE3A, 5NE4A,
5NE5A, 5NE6A, 5NE7A, 5NE8A
5NL0D, 5NL1D, 5NL2D, 5NL3D, 5NL4D,
5NL5D, 5NL6D, 5NL7D, 5NL8D
5NL0E, 5NL1E, 5NL2E, 5NL3E, 5NL4E,
5NL5E, 5NL6E, 5NL7E, 5NL8E
2019 QX50
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 ECM
(1)
DE97AA
HD
32
(2)
Reference the electronic parts catalog and use 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).
AMENDMENT HISTORY
PUBLISHED DATE
May 3, 2019
REFERENCE
ITB19-012
DESCRIPTION
Original bulletin published
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ITB19-012