Engine Controls - MIL ON/DTC's P1278/P1279
Classification:EC03-019C
Reference:
NTB03-064C
Date:
November 1, 2004
2003-2005 SENTRA; MIL "ON" WITH DTC P1278 OR P1279 STORED
This bulletin amends NTB03-064. The Applied Vehicles information has been amended.
Please discard all paper copies of the earlier versions.
APPLIED VEHICLES:
2003, 2004 and 2005 Sentra (B15) with QG18DE engine ONLY*
2004 Sentra (B15) with QR25DE engine (Federal emissions specification) and Automatic Transmission ONLY*
*See "ECM Part Number Check" for bulletin applicability verification.
IF YOU CONFIRM:
A MIL "ON" with P1278 or P1279 (A/F Sensor 1) stored in the ECM.
ACTIONS:
A. Confirm this bulletin applies:
^ Check the Current ECM Part Number (P/N).
^ Compare your Current ECM P/N to those listed in Chart A.
If your ECM P/N is not listed, this bulletin does not apply. Go back to ASIST for further diagnostic and repair information.
B. Reprogram the ECM.
C. If needed (as specified by Chart A), perform Idle Air Volume Learning (IAVL) shown in this bulletin.
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.
CLAIMS INFORMATION
SERVICE PROCEDURE
Step A: Confirm This Bulletin Applies
1. With CONSULT-II "ON", print the Freeze Frame data as shown.
2. Attach this printout to the Repair Order.
^ Figure 1 is an example of the F.F. Data printout.
^ The Freeze Frame data that you've printed contains the ECM P/N.
^ The ECM P/N will be used to see if this bulletin applies or not.
3. ECM Part Number (P/N) Check.
> Compare your vehicle's ECM P/N (shown in the print-out from steps 1 and 2) to those shown under Current ECM P/N in Chart A shown.
> If your vehicle's ECM P/N is listed in Chart A:
a. Look under the Select # column and write down the 2-digit number that matches your vehicle ECM-if applicable.
b. Perform ECM Reprogramming shown below, then,
c. If needed (as specified by Chart A), perform Idle Air Volume Learning shown below.
> If your vehicle's ECM P/N is not listed in Chart A:
^ This bulletin does not apply. Go back to ASIST for further diagnostic and repair information.
NOTES:
^ Some of the Vehicle Configurations shown in Chart A may have 2 different Reprogramming Data choices in ASIST, depending on the Current ECM P/N.
^ When there is more than 1 choice for a particular configuration, an ASIST Data Select # will show before the "To" number in ASIST.
^ In that case, use the ASIST Data Select # from Chart A to choose the appropriate Reprogramming Data from ASIST.
Step B: Reprogram the ECM
ECM Reprogramming Overview
There are four basic steps (tasks) under Step B:
1. Download (transfer) reprogramming data from ASIST into CONSULT-II.
2. "Preparation" steps before reprogramming ECM.
3. Reprogram the ECM.
4. "Wrap-up" after ECM reprogramming is finished.
NOTE:
^ For those familiar with ECM Reprogramming, please review the following steps and use them as a Quick Reference for ECM reprogramming.
Step One: Download (Transfer) Reprogramming Data from ASIST into CONSULT-II
1. Using your ASIST terminal and "mouse", select (click on) the vehicle model and model year (Example: Sentra, 2004).
2. Select the correct reprogramming data:
a. Locate the specific "Model Configuration" (Example: M/T, ASCD).
NOTE:
Model Configuration may include items such as engine type, transmission type, and vehicle options such as ASCD, TCS, ABS etc.
b. Select the "To" number.
NOTE:
The "To" number will read: 23710-XXXXX.
3. Click on the "Add" button.
^ This will add the data you selected to the "File(s) Selected" list.
4. Write the "To" number on the Repair Order.
5. Click on "Continue" and follow directions to perform "data transfer" (download the data from ASIST into CONSULT-II).
Step Two: Preparation Steps before Reprogramming ECM
1. Connect a battery charger to the vehicle's battery. Set the charger to a low charge rate (trickle charge).
CAUTION:
For steps 2 and 3 shown below, DO NOT connect the CONSULT-II A/C Power Supply (see Figure B).
2. Press [SUB MODE] (see Figure C), then:
a. From the listed items, find and select [BATTERY CHARGE].
3. Check the CONSULT-II's "Charger Input" reading (see Figure D).
NOTE:
^ "Battery Voltage" is the voltage level of CONSULT-II's battery.
^ "Charger Input" is the voltage level of the vehicle's battery. (It must be above 12 volts.)
Step Three: Reprogram the ECM
Step Four: "Wrap-up" After Reprogramming is Finished
1. Turn the ignition switch "OFF" and CONSULT-II "OFF".
2. Wait more than 10 seconds, then:
a. Turn the ignition switch "ON" for 2 seconds, then
b. Turn the ignition switch "OFF" again for 10 seconds (see Figure E). This will reset ECM "self learned" Data.
3. Make sure the MIL is "OFF".
^ If the MIL comes "ON", use CONSULT-II with the Diagnostic (red/white) Card to erase any DTCs that may have stored during the reprogramming procedure.
Step C: If Needed, Perform Idle Air Volume Learning (IAVL)
1. Determine if your vehicle needs IAVL performed:
a. Go back to Chart A.
b. Locate the Current ECM P/N that matched your vehicle.
c. Look in the right side column titled "IAVL?".
^ If Yes: Go to step 2, below, to perform IAVL.
^ If No: Do not perform IAVL. Repair is complete.
2. Perform Idle Air Volume Learning (IAVL).
Disclaimer