Service Procedure
SERVICE PROCEDUREStep A: Check and Compare the Current ECM Part Number (P/N)
1. With CONSULT-II (C-II) "ON", print the ECM P/N as follows:
[START(Nissan)] >> [ENGINE] >> [ECM PART NUMBER] >> [COPY]
^ Figure 1 is an example of the ECM P/N printout.
^ You will use the ECM P/N to see if this bulletin applies.
^ Leave C-II connected to the vehicle at this time.
2. Compare your vehicle's ECM P/N to those shown under Current ECM P/N in Chart A, above.
^ Use the ECM P/N printout (see example shown previously above, Figure 1).
NOTE:
> Some States may have both ULEV (50-State emissions) and CAL SULEV (California emissions) level vehicles.
> It is best to refer to Current ECM P/Ns (above) to determine the vehicle configuration.
> If your vehicle's ECM P/N matches one of the Current ECM P/Ns in the chart above, this bulletin applies. Continue with this procedure and perform Step B and C.
> If your vehicle's ECM P/N does not match one of the Current ECM P/Ns in the chart above, this bulletin does not apply. Refer back to ASIST for further diagnostic and repair information.
Step B: Reprogram the ECM
ECM Reprogramming Overview
There are four basic steps:
Step 1: Download reprogramming data (transfer it) from ASIST into C-II.
Step 2: "Preparation" steps before reprogramming.
Step 3: Reprogram the ECM.
Step 4: ECM reprogramming "Wrap-up".
If you are familiar with ECM reprogramming:
^ Review Step 1 though Step 4, starting below.
^ Use them as a "Quick Reference" for ECM reprogramming.
CAUTION
1. Select vehicle model and model year (Example: Altima 2005).
2. Select the correct Reprogramming Data:
a. Locate the specific "Vehicle Configuration" (Example: A/T, ASCD).
NOTE:
Vehicle Configuration may include items such as engine type, transmission type, and vehicle options such as ASCD, TCS, ABS, etc.
b. Select (click on) the "To" number for your Vehicle Configuration for the Reprogramming Data. (Write the "To" number on the repair order.)
NOTE:
The "To" number will read: 23710-XXXXX.
3. Click on the "Add" button.
^ This will add the selected data to the "File(s) Selected" list.
4. Click on "Continue" and follow the on-screen directions to perform "data transfer" (download) from ASIST into C-II.
Step Two: Preparation Steps Before Reprogramming
1. Connect a battery charger to the vehicle's battery.
^ Set the charger to a low charge rate (trickle charge).
CAUTION:
For number 2, and number 3 below, DO NOT connect the C-II AC power supply.
2. Press [SUB MODE] (see Figure 7) then:
a. From the listed items, find and select [BATTERY CHARGE]
3. Check the C-II "Charger Input" reading (see Figure 8).
NOTE:
^ "Battery Voltage" is the voltage level of the CONSULT-II battery.
^ "Charger Input" is the voltage level of the vehicle's battery. (It must be above 12 volts.)
CAUTION:
If the "Charger Input" is below 12 volts:
^ A list of items to check is contained in the "ECM Reprogramming for Nissan Vehicles" General Procedure.
Step Three: Reprogram The ECM
Step Four: ECM Reprogramming "Wrap-up"
1. Turn the ignition switch "OFF" and C-II "OFF".
2. Wait more than 10 seconds, and then:
a. Turn the ignition switch "ON" for 2 seconds, and then
b. Turn the ignition switch "OFF" again for 10 seconds (see Figure 9).
^ This will reset ECM "self learned" Data.
3. Start the engine and check the idle speed.
^ If idle speed is too low, perform "Idle Air Volume Learning" (IAVL).
^ See the appropriate ESM for this procedure.
NOTE:
If the engine will not idle, hold the engine RPM at about 2000, then slowly bring it down to an idle. IAVL can now be performed.
4. Confirm the engine is operating normally.
5. Make sure the MIL is OFF.
^ If it's still ON, use C-II with the Diagnostic (red/white) Card to erase any DTCs that may have stored during the reprogramming procedure.
6. Go to Step C below.
Step C: Perform P0420 DTC Confirmation Using CONSULT II
IMPORTANT:
Before starting the DTC Confirmation procedure, erase all DTCs. Regardless if there are no DTCs, press the ERASE button on C-II. This will reset all SRTs to "INCMP" (incomplete).
NOTE:
If the DTC Confirmation Procedure has been previously conducted, always turn the ignition switch OFF and wait at least 10 seconds before conducting the next test.
TESTING CONDITION: Do NOT hold engine speed for more than the specified times given below.
1. Turn the ignition switch ON.
2. With C-II, select "DATA MONITOR" mode.
3. Start the engine and then warm it up to operating temperature.
4. Turn the ignition switch OFF and wait for 10 seconds.
5. Start the engine and keep the engine speed between 3,500 and 4,000 RPM for at least one (1) minute under no load.
6. Let the engine idle for one (1) minute.
7. Make sure that "COOLAN TEMP/S" indicates more than 70°C (158°F). See Figure 2 for example.
8. Open the engine hood.
9. Select "DTC & SRT CONFIRMATION", and then "WORK SUPPORT" mode. See Figure 3 for example.
10. Rev the engine to 2,500 - 3,500 RPM, hold it for three (3) consecutive minutes, and then release the accelerator pedal completely.
11. Wait five (5) seconds at idle.
12. Rev the engine up to 2,000 to 3,000 RPM and maintain it until "INCMP" of "CATALYST" changes to "CMPLT" (it will take approximately five (5) minutes).
13. If "INCMP" changes to "CMPLT" (see Figure 4 for example):
^ Inspection and repairs in this bulletin are complete.
^ Do NOT replace the catalytic converter.
14. If "INCMP" does not change to "CMPLT" see Figure 5 for example):
^ Stop the engine and let it cool down to less than 70°C (158°F), and then retest Step 1 above.
15. If "INCMP" still does not change to "CMPLT":
^ Replace the catalytic converter (exhaust manifold assembly).
> Refer to the ESM for catalytic converter replacement.
> Refer to the Nissan Warranty Flat Rate Manual for claims coding.
> Refer to your Electronic Parts Catalog for correct parts selection.