Engine, A/T Controls - Hesitation, RPM Drop, Stalling
Classification:EC12-034
Reference:
NTB13-001
Date:
January 3, 2013
2013 SENTRA; ENGINE HAS HESITATION OR STOPS RUNNING AT IDLE OR VERY LOW SPEEDS
APPLIED VEHICLE:
2013 Sentra (B17)
APPLIED VIN AND DATE
Built before 3N1AB7AP(*)DL650298 And before December 14, 2012
APPLIED TRANSMISSION:
CVT
IF YOU CONFIRM:
^ The engine intermittently experiences a small RPM decrease for a short duration or stops running during braking, as the vehicle is coming to a stop.
^ The engine intermittently experiences a small RPM decrease for a short duration or stops running when shifting into reverse or drive.
^ There is a hesitation/lag or the engine stops running when accelerating from a stop.
ACTION:
1. Refer to step 6 in the SERVICE PROCEDURE and use the ECM Part Number to confirm this bulletin applies to the vehicle you are working on.
2. If this bulletin applies, reprogram the ECM first and if applicable the TCM.
^ Some vehicles may only require the ECM to be reprogrammed and may not require the TCM to be reprogrammed.
^ Use Table A on page 6 to determine if TCM reprogramming is applicable.
^ Refer to Claims Information.
IMPORTANT:
The purpose of ACTION 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.
CLAIMS INFORMATION
SERVICE PROCEDURE
^ This procedure will require reprogramming of the ECM first, and for some vehicles the 1CM; which means most steps in this procedure may need to be done twice.
^ Most instructions for reprogramming with CONSULT-III plus (C-III plus) are displayed on the CONSULT PC screen.
^ If you are not familiar with the reprogramming procedure, click here. This will link you to the "CONSULT-III plus (C-III plus) Reprogramming" general procedure.
Preparation for Reprogramming
^ 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
NOTE:
^ After ECM reprogramming is complete, you will be required to perform Throttle Valve Closed Position, Idle Air Volume Learn (IAVL), and Accelerator Closed Position.
^ The above conditions are required for the IAVL to complete.
1. Connect the CONSULT PC to the vehicle to begin the reprogramming procedure.
2. Open ASIST on the CONSULT PC and start C-III plus.
3. Wait for the plus VI to be recognized / connected.
^ Serial number will display when the plus VI is recognized / connected.
4. Select Re/programming, Configuration.
5. Follow the on-screen instructions and navigate the C-III plus to the screen shown in Figure 2.
6. When you get to the screen shown in Figure 2, confirm this bulletin applies as follows:
A. Find the ECM or 1CM Part Number and write it on the repair order.
NOTE:
This is the current ECM or 1CM Part Number (P/N). ECM preprogramming must be performed first.
B. Compare the P/N you wrote down to the numbers in the Current ECM or TCM Part Number column in Table A.
^ If there is a match, this bulletin applies. Continue with the reprogramming procedure.
^ If there is not a match, reprogramming does not apply. Make sure to check both ECM and 1CM for a match.
7. Follow the on-screen instructions to navigate C-III plus and reprogram the ECM or TCM.
NOTE:
^ In some cases, more than one new P/N for reprogramming is available.
> In this case, the screen in Figure 3 displays.
> Select and use the reprogramming option that does not have the message "Caution! Use ONLY with N1BXX-XXX".
^ If you get this screen and it is blank (no reprogramming listed), it means there is no reprogramming available for this vehicle.
8. When the screen in Figure 4 displays, reprogramming is complete.
NOTE:
If the screen in Figure 4 does not display (reprogramming does not complete), refer to the information.
9. Disconnect the battery charger from the vehicle.
10. Select Next.
NOTE:
^ In the next steps:
> For ECM reprogramming you will perform Throttle Valve Closed Position, Idle Air Volume Learn, Accelerator Closed Position, and DTC erase.
> For 1CM reprogramming, only DTC erase is needed.
^ These operations are required before C-III plus will provide the final reprogramming confirmation report.
ECM/TCM recovery:
Do not disconnect plus VI or shut down Consult III plus if reprogramming does not complete.
If reprogramming does not complete and the "!?" icon displays as shown in Figure 5:
^ Check battery voltage
(12.0-15.5 V).
^ Ignition is ON, engine OFF.
^ External Bluetooth(R) devices are OFF.
^ All electrical loads are OFF.
^ Select retry and follow the on screen instructions.
^ "Retry may not go through on first attempt and can be selected more than once.
If reprogramming does not complete and the "X" icon displays as shown in Figure 6:
^ Check battery voltage
(12.0 - 15.5 V).
^ CONSULT A/C adapter is plugged in.
^ Ignition is ON, engine OFF.
^ Transmission is in Park.
^ All C-III plus / VI cables are securely connected.
^ All C-III plus updates are installed.
^ Select Home, and restart the reprogram procedure from the beginning.
11. Follow the on-screen instructions to perform the following:
NOTE:
For TCM reprogramming only erase DTCs as needed.
^ Throttle Valve Closed Position.
^ Idle Air Volume Learn (IAVL).
NOTE:
^ Listed below are the conditions required for IAVL to complete.
^ If IAVL does not complete within a few minutes, a condition may be out of range.
> Engine coolant temperature: 7O-1O5° C (158-221° F). Battery voltage: More than 12.9V (At idle).
> Selector lever: P or N.
> Electric load switch: OFF (Air conditioner, headlamp, and rear window defogger).
> Steering wheel: Neutral (Straight-ahead position). Vehicle speed: Stopped.
> Transmission: Warmed up (ATF TEMP SE less than 0.9V).
^ Accelerator Pedal Close Position Learning.
^ Erase DTCs.
12. When the entire reprogramming process is complete, the screen in Figure 7 will display.
13. Verify the before and after part numbers are different.
14. Print a copy of this screen (Figure 7) and attach it to the repair order for warranty documentation.
15. Select Confirm.
16. Make sure you have performed both ECM and TCM reprogramming (ECM first).
17. Close C-III plus.
18. Turn the ignition OFF.
19. Disconnect the plus VI from the vehicle.
20. Test drive the vehicle and make sure it operates correctly and the MIL is OFF.
^ If the MIL comes ON, go back to AS 151 for further diagnostic information.
^ Diagnosis and repairs beyond ECM or 1CM reprogramming are not covered by this bulletin.
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