Engine Controls - MIL ON, A/F Sensor Related DTC's Stored
Classification:EC11-024a
Reference:
ITB11-054a
Date:
January 2, 2013
2011-2013 QX56 AND 2011-2012 M56; MIL ON WITH A/F SENSOR RELATED DTC STORED
This bulletin has been amended in the APPLIED VEHICLES section and the SERVICE PROCEDURE. Discard all previous versions of this bulletin.
APPLIED VEHICLES:
2011 - 2013 QX56 (Z62)
2011-2012 M56(Y51)
APPLIED ENGINE:
VK56VD series V8
IF YOU CONFIRM:
Any of the following DTCs are stored in the ECM:
^ P0031 / P0051, P0032 / P0052, P0130 / P0150, P0133 / P0153, P2A00 / P2A03, P1148 / P1168
OR
Any of the following DTCs are stored in the ECM as a result of one of the A/F sensors:
^ P0300 - P0308 - P0171 / P0174, P0172 / P0175
ACTION:
1. Replace the A/F sensor that relates to the stored DTC(s) (B1 and/or B2).
2. Refer to step 7 in the SERVICE PROCEDURE to confirm if ECM reprogramming applies.
3. If it applies reprogram the ECM.
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.
PARTS INFORMATION
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the claims coding shown.
SERVICE PROCEDURE
1. Replace the A/F sensor on the affected bank (related to the stored DTC).
^ For replacement procedure refer to the appropriate Electronic Service Manual (ESM).
2. Next connect the CONSULT PC to the vehicle to begin the reprogramming procedure.
3. Open ASIST on the CONSULT PC and start C-III plus.
4. Wait for the plus VI to be recognized / connected.
^ The serial number will display when the plus VI is recognized / connected.
5. Select Re/programming, Configuration.
6. Follow the on-screen instructions and navigate C-III plus to the screen shown in Figure 2.
7. When you get to the screen shown in Figure 2 confirm ECM reprogramming applies as follows.
A. Find the ECM Part Number and write it on the repair order.
NOTE:
This is the current ECM Part Number (P/N).
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 the ECM needs to be reprogrammed. Continue with the reprogramming procedure.
^ If there is not a match the ECM does not need to be reprogrammed. Close C-III plus - repairs are completed.
8. Follow the on-screen instructions to navigate C-III plus and reprogram the ECM.
9. 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 ECM Recovery.
10. Disconnect the battery charger from the vehicle.
11. Select Next.
NOTE:
^ In the next steps you will perform Throttle Valve Closed Position, Idle Air Volume Learn, Accelerator Closed Position, and DTC erase.
^ These operations are required before C-III plus will provide the final reprogramming confirmation report.
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.
12. 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
13. When the entire reprogramming process is complete the screen in Figure 7 will display.
14. Verify the before and after part numbers are different.
15. Print a copy of this screen (Figure 7) and attach it to the repair order for warranty documentation.
16. Select Confirm.
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 reprogramming are not covered by this bulletin.
Disclaimer