ITB14056

Classification:
Reference:
Date:
EC14-012
ITB14-056
November 25, 2014
PERMANENT DTC (P-DTC) INFORMATION
APPLIED VEHICLES:
2010 and newer – see Applied Vehicles chart on page 4.
SERVICE INFORMATION
Starting with 2010 Model Year, Infiniti vehicles have been gradually incorporating a new type of DTC known as
“Permanent DTC or P-DTC”. Please refer to the P-DTC Applied Vehicles list on page 4.

If a vehicle is equipped with P-DTCs, all emission related DTCs will also set a P-DTC if the MIL is
turned ON.

A listing of which DTCs that will also set a P-DTC is found in the DTC Index in the EC-Engine Control
section of the Electronic Service Manual (ESM).
If a DTC repair is performed and the DTC erased, a vehicle may fail an Emission Inspection and Maintenance
test if the P-DTC is not also erased.
P-DTC’s can be erased by following the correct driving pattern:

Use CONSULT-III plus (C-III plus) to confirm a P-DTC and determine the correct driving pattern to
erase it (see page 2).

Refer to the ESM, section EC-Engine Control, for driving pattern information. Look under How to Erase
a Permanent DTC and Diagnosis Description.

Details for driving pattern B and D are included in this bulletin, starting on page 2.
NOTE: In most cases, if repairs are complete, P-DTCs will erase with the customer driving their vehicle
in their normal daily use.
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 dealer to determine if this
applies to your vehicle.
1/4
Example of Permanent DTC (P-DTC)
Permanent DTC
Driving patterns required
to erase the Permanent
DTC
Driving Patterns B and D for Erasing P-DTCs
NOTE:

The DTC Index in the ESM, for vehicles equipped with P-DTCs, includes a Group classification of “A”
or “B” for DTCs that also set P-DTCs. P-DTC with a Group classification of B requires completion of
driving pattern B and D to erase the P-DTC. In most cases, completion of driving pattern B will also
complete driving pattern D.

With C-III plus, use PERMANENT DTC WORK SUPPORT while performing driving patterns.

Make sure to obey all traffic laws and speed limits when performing driving patterns.
Continued on the next page
2/4
ITB14-056
Driving Pattern B
Driving pattern B means a trip satisfying the following conditions:







Engine speed reaches 400 rpm or more.
Engine coolant temperature reaches 70°C (158°F) or more.
Vehicle speed of 70 – 120 km/h (44 – 75 MPH) is maintained for 60 seconds or more.
Vehicle speed of 30 – 60 km/h (19 – 37 MPH) is maintained for 10 seconds or more.
Vehicle speed of 4 km/h (2 MPH) or less with idling for 12 seconds or more.
Vehicle speed of 10 km/h (7 MPH) or more for 10 minutes or more in total.
22 minutes or more elapsed time after engine start.
NOTE:
 Drive the vehicle at steady speeds when a “maintained” speed is required.
 When the same malfunction (DTC) is detected regardless of driving conditions, driving pattern B
must be restarted.
Driving Pattern D
Driving pattern D means a trip satisfying the following conditions:



Vehicle speed of 40 km/h (25 MPH) or more for 300 seconds or more.
Maintain continuous idle speed for 30 seconds or more.
600 seconds or more elapsed time after engine start.
NOTE: When the same malfunction (DTC) is detected regardless of driving conditions, driving pattern D
must be restarted.
3/4
ITB14-056
Applied Vehicles (vehicles that use P-DTCs):

All 2015 models have P-DTCs.

2010 to 2014 as follows:
MODEL
G25
G37 G37 Coupe
G37 Convertible
G37 IPL Coupe
G37 IPL Convertible
Q50
Q50 Hybrid
Q60 Coupe
Q60 ILP Coupe
Q60 Convertible
Q60 IPL Convertible
EX35
EX37
QX50
M35 / M45
M37 / M37x
M56 / M56x
M35h
Q70
Q70 Hybrid
JX35
QX60
QX60 Hybrid
FX35
FX50
FX37
QX70
QX56
QX80
ENGINE
VQ25HR
2010
N/A
2011
Yes
2012
Yes
2013
N/A
2014
N/A
VQ37VHR
Yes
Yes
Yes
Yes
N/A
VQ35HR Hybrid
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
VQ37VHR
N/A
N/A
N/A
N/A
Yes
VQ35HR
VQ37VHR
No
N/A
N/A
No
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
No
No
N/A
N/A
No
N/A
Yes
N/A
N/A
N/A
Yes
No
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
N/A
N/A
No
N/A
Yes
N/A
N/A
N/A
Yes
No
Yes
N/A
N/A
N/A
N/A
N/A
Yes
Yes
N/A
N/A
Yes
N/A
N/A
Yes
N/A
N/A
Yes
No
Yes
N/A
N/A
Yes
N/A
N/A
N/A
Yes
Yes
N/A
Yes
N/A
N/A
N/A
Yes
N/A
N/A
N/A
N/A
Yes
Yes
N/A
Yes
Yes
N/A
N/A
N/A
Yes
N/A
Yes
VQ35HR / VK45DE
VQ37VHR
VK56VD
VQ35HR Hybrid
VQ37VHR / VK56VD
VQ35HR Hybrid
VQ35DE
VQ35DE
QR25DER Hybrid
VQ35HR
VK50VE
VQ37VHR
VQ37VHR / VK50VE
VK56DE / VK56VD
VK56VD
4/4
ITB14-056