Engine Controls - Low/Fluctuating Idle After Hot Restart

Classification: EC10-020

Reference: NTB10-080

Date: June 23, 2010

2009 350Z ROADSTER; LOW IDLE OR IDLE FLUCTUATION AFTER HOT RESTART

APPLIED VEHICLE: 2009 - 350Z Roadster (Z33)

IF YOU CONFIRM:

The engine idle is low or fluctuates when all of the following occur:

^ The vehicle is driven until the engine reaches normal operating temperature.

AND

^ The vehicle is parked.

AND

^ The engine is restarted 5-15 minutes after parking.

ACTION:

Confirm this bulletin applies.

^ Check and compare your Current ECM Part Number to TABLE A.

If that part number does not match one in Table A, this bulletin does not apply. Go back to ASIST for further diagnostic and repair information.

If this bulletin 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.





CLAIMS INFORMATION

SERVICE PROCEDURE

1. Connect CONSULT-III (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 example):

^ 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 number in the Current ECM Part Number in TABLE A above.

^ If there is a match, this bulletin applies. Continue with the reprogramming procedure.

NOTE:
If there is a match to two lines (two reprogramming options) on your C-III screen, use the one that does not have the message "Caution! Use ONLY with NTBXX-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 appears when reprogramming is complete.

4. Make sure to erase DTCs from all Systems.

NOTE:
During the reprogramming, DTCs will set in several systems. DTCs must be erased from all systems.

5. Test drive the vehicle and make sure it operates correctly and the Check Engine light is OFF.

^ If the Check Engine light 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.