Engine Controls - Small Engine RPM Increase When Braking

Classification: EC11-008

Reference: NTB11-015

Date: February 22, 2011

2010 FX35 AND M35; INTERMITTENT/SHORT DURATION SMALL RPM INCREASE DURING BRAKING

APPLIED VEHICLES:
2010 FX35 (S51)
2010 M35 (Y50) 2WD only

APPLIED ENGINE VQ35 (V6)

IF YOU CONFIRM:

The engine intermittently experiences a small RPM increase (less than 500 RPM) for a short duration during braking.

ACTIONS:
1. Refer to Step 2 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

IMPORTANT:
The purpose of "ACTIONS" (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.

SERVICE PROCEDURE

1. Connect C-III to the vehicle to begin the reprogramming procedure.





CAUTION





2. When you get to the ECM Reprogramming screen shown in Figure 1 confirm this bulletin applies as follows:

A. On your C-III screen look at the Part Number column (see Figure 1):

^ If this column is blank (no part number listed) this bulletin does not apply. Close C-III and refer to ASIST for further diagnostic information.

^ If a Part Number is listed write it on the Repair Order.





B. Compare the Part Number 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.

NOTE:
If there are two lines (two reprogramming options) on your C-III screen use the one that does not have the message "CAUTION! Use ONLY with ITBXX-XXX".

^ If there is not a match this bulletin does not apply. Close C-III and refer to ASIST for further diagnostic information.





3. If this bulletin applies and you have performed ECM reprogramming the screen in Figure 2 displays when reprogramming is complete.

NOTE:
If the screen in Figure 2 does not display (reprogramming does not complete).

4. Make sure to erase DTCs from all Systems.

NOTE:
During the reprogramming DTCs will set in several systems and must be erased.

5. 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. Refer to the applicable Electronic Service Manual as needed.

^ Diagnosis and repairs beyond the ECM reprogramming are not covered by this bulletin.