Engine Controls - DTC P0128 Stored In ECM

Classification: EC07-001C

Reference: NTB07-020C

Date: April 27, 2009

2007 ALTIMA AND SENTRA; DTC P0128 THERMOSTAT FUNCTION

This bulletin has been amended. The Claims Information and Service Procedure have been updated. No other changes have been made. Please discard all previous versions of this bulletin.

APPLIED VEHICLES:
2007 Altima (L32) with QR25 engine (excludes Hybrid). 2007 Sentra (B16) with MR20 engine.

NOTE:
For 2007 Altima Hybrid with DTC P0128, refer to NTB08-010.

IF YOU CONFIRM

DTC P0128 (Thermostat Function) is stored in the ECM, and there are no driveability or overheating symptoms,

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 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. Print this screen and attach it to the Repair Order for Warranty documentation.

4. Make sure to erase DTCs from all systems.

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

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.





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