Service Procedure

Step A: Check the Current ECM Part Number (P/N)

With CONSULT-II "ON", print the ECM Part Number as follows:

[START(Nissan)] >> [ENGINE] >> [ECM PART NUMBER] >> [COPY]





^ Figure 1 is an example of the ECM Part Number printout.

^ You will use the ECM Part Number (P/N) to see if this bulletin applies.

Step B: Compare Your Current ECM P/N to Chart A





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 from Step A (Figure A):

NOTE:
^ Some States that have required California emissions may have both CAL SULEV and 50-State emissions level vehicles.

^ It is best to refer to the Current ECM P/N 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 Steps C and D.

^ 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. Go back to ASIST for further diagnostic and repair information.

Step C: Remove the front exhaust pipe and inspect the catalyst lower surface





1. Remove the two nuts that hold the front exhaust pipe to the exhaust manifold /catalyst.

^ Discard the old gasket. Replace with a new gasket during reassembly.

NOTE:
The stud(s) may come out of the Catalyst when removing the nut - this is okay. Just re-install them later.





2. Remove the two nuts that hold the front exhaust pipe to the muffler.

3. Separate the front exhaust pipe from the muffler.

^ Discard the old gasket. Replace with a new gasket during reassembly.





4. Slide the front exhaust pipe hanger pin out of the front exhaust pipe hanger.

5. Remove the exhaust pipe from the vehicle.





6. Inspect the entire catalyst lower surface as shown in Figure 4.

IMPORTANT:
Make sure you inspect the entire lower surface. You are looking for cracks or holes in the lower surface.

7. Catalytic converter inspection results:

If the catalyst is OK with only powder, scratch, or discoloration:

a. Do not replace the catalytic converter.

b. Reassemble the exhaust front tube with a new gasket in the reverse order of disassembly.

c. Go to step D below.

If the catalyst is NG with cracks or holes:

a. The catalytic converter needs to be replaced.

b. This bulletin does not cover replacement of the catalytic converter.

c. Refer to the applicable Service Manual for replacement instructions.

d. Refer to the current Nissan Warranty Flat Rate Manual for warranty claims information

e. Go to step D shown below.

Step D: Reprogram the ECM

ECM Reprogramming Overview

There are four basic steps.

Step 1: Download reprogramming data (transfer it) from ASIST into CONSULT-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 One though Step Four - starting below.

^ Use them as a "Quick Reference" for ECM reprogramming.





CAUTION

Step One: Download Reprogramming Data (Transfer) Data From ASIST Into CONSULT-II





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 CONSULT-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 3 below, DO NOT connect the CONSULT-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 CONSULT-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 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 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 Service Manual (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 CONSULT-II with the Diagnostic (red/white) Card to erase any DTCs that may have stored during the reprogramming procedure.