Engine Controls - Hesitation, Engine RPM Drop, Stalling
Classification:EC11-005b
Reference:
ITB11-18b
Date:
January 28, 2013
2007-2008 G35, 2008 EX35 AND 2009-2010 FX35;
ENGINE HESITATION OR STOPS RUNNING AT IDLE OR VERY LOW SPEEDS
This bulletin has been amended to include additional Part Numbers in Table "A" and to change the reprogramming procedure to CIII plus. Please discard any previous versions.
APPLIED VEHICLES:
2007 - 2008 G35 Sedan (V36)
2007 G35 Coupe (CV35)
2008 EX35 (J50)
2009 - 2010 FX35 (551)
IF YOU CONFIRM:
That the customer has experienced or is experiencing:
^ Engine hesitation at idle or very low speeds, and/or
^ Engine speed drops lower than expected when decelerating or coming to a stop, and/or
^ Engine stops running at idle or very low vehicle speeds (parking lot maneuvers) but can be restarted.
NOTE:
This incident may occur immediately after an oil change.
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.
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the claims coding shown:
SERVICE PROCEDURE
NOTE:
^ 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 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 1 2.9V (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.
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.
^ The 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 on Step 6.
IMPORTANT:
During the initial "Reprogramming Confirmation" set-up, if you get this screen (Figure 1A):
1. Select Delete, then
2. Select Other Operation, then
3. Continue with the reprogramming procedure.
6. When you get to the screen shown in Figure 2 confirm this bulletin applies as follows.
A. Find the ECM Part Number and write it on the repair order.
B. Compare the P/N you wrote down to the numbers in the Current ECM 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, this bulletin does not apply. Close C-III plus and refer to ASIST for further diagnostic information.
7. Follow the on-screen instructions to navigate C-III plus and reprogram the ECM.
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 ITBXX-XXX".
^ If you get this screen and it is blank (no reprogramming listed), it means there is no reprogramming available for this vehicle. Close C-III plus and refer back to ASIST for further diagnosis.
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 ECM Recovery information.
9. Disconnect the battery charger from the vehicle.
10. Select Next.
ECM 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:
^ Throttle Valve Closed Position
^ Idle Air Volume Learn (IAVL)
NOTE:
^ Listed below are common conditions required for IAVL to complete.
^ If IAVL does not complete within a few minutes, a condition may be out of range.
^ Refer to the appropriate Electronic Service Manual (ESM) for specific conditions required for the vehicle you are working on.
> Engine coolant temperature: 70 - 100° C (158 - 212°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
^ 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. Close C-III plus.
17. Turn the ignition OFF.
18. Disconnect the plus VI from the vehicle.
19. 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 reprogramming are not covered by this bulletin.
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