2017 Infiniti G37 Sedan V6-3.7L Diagnostic and Repair Information # 12-027D Date: 121114
Engine, A/T Controls - Hesitation On Acceleration/Harsh Shiftin
Classification: AT12-003D
Reference: ITB12-027D
Date: November 14, 2012
2009 - 2012 G37; SHIFT RESPONSIVENESS ISSUES
This bulletin has been amended to change the first sentence of the IF YOU CONFIRM statement. Discard and previous versions.
APPLIED VEHICLES: 2009 - 2011 G37 Sedan and Coupe (V36/CV36)
2009 - 2012 Convertible (HV36)
APPLIED ENGINE: VQ37VHR
APPLIED TRANSMISSION:7 speed
IF YOU CONFIRM
That the customer has experienced or is experiencing:
^ Harsher than expected down shifts when coasting to a stop
^ Hesitation/lag when accelerating after coasting
^ Hesitation/lag or harsher than expected down shifts when coming to a stop and accelerating again (rolling stop)
^ Engine rev matching during moderate to heavy braking
NOTE:
Engine rev matching is normal operation of the ASC (Adaptive Shift Control) in normal drive mode and sport mode. The ECM and TCM
reprogramming in this bulletin will remove engine rev matching from ASC in normal drive mode, but it will remain as part of the ASC in sport
mode.
ACTION
1. Refer to step 6 in the SERVICE PROCEDURE to confirm this bulletin applies to the vehicle you are working on.
2. If this bulletin applies, reprogram the ECM and TCM.
CLAIMS INFORMATION
Service Procedure
^ This procedure will require reprogramming of the ECM and TCM; which means most steps in this procedure will 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, refer to "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:
Page 2
> Engine coolant temperature: 70-100锟斤拷C (158-212锟斤拷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.
CAUTION
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.
Page 3
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 C-III plus on-screen instructions and navigate to the screen shown in Figure 2 above.
Page 4
IMPORTANT:
While navigating C-III plus, if the screen in Figure 1A displays, select Delete and then Other Operation.
6. When you get to the screen shown in Figure 2, confirm this bulletin applies as follows:
A. Find the ECM or TCM Part Number and write it on the repair order.
NOTE:
This is the current ECM or TCM Part Number (P/N).
Page 5
Page 6
Page 7
B. Compare the P/N you wrote down to the numbers in the Current ECM Part Number column in Table A above, and TCM Part Number
column in Table B above.
^ 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 TCM 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.
Page 8
> 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 ITBXX-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 below.
9. Disconnect the battery charger from the vehicle.
10. Select Next.
NOTE:
Page 9
^ In the next steps starting with step 11:
1. For ECM reprogramming you will perform Throttle Valve Closed Position, Idle Air Volume Learn, Accelerator Closed Position,
and DTC erase.
2. For TCM 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 C-III plus if reprogramming does not complete.
If reprogramming does not complete and the "!?" icon displays as shown in Figure 5 and information.
If reprogramming does not complete and the "X" icon displays as shown in Figure 6 and information.
11. Follow the on-screen instructions to perform the following:
^ 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.
Page 10
> Engine coolant temperature: 70-105锟斤拷C (158-221锟斤拷F)
> Battery voltage: More than 12.9V (At idle)
> Selector lever: P or N
> Electric load switch: OFF (Air conditioner, headlamp, 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.
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 ASIST for further diagnostic information.
^ Diagnosis and repairs beyond ECM or TCM reprogramming are not covered by this bulletin.
