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 Part Number (P/N).
^ You will use the ECM P/N to see if this bulletin applies.
ECM Part Number Check:
3. Using the ECM P/N printout from Step 1 (Figure 1);
^ Compare your vehicle's ECM P/N to those shown under Current ECM P/N in Chart A, shown.
A. If your vehicle's ECM P/N matches a Current ECM P/N in the chart above:
^ This bulletin applies. Go to Step B, Reprogramming the ECM.
B. If your vehicle's ECM P/N does not match a P/N in the chart above:
^ This bulletin does not apply. Go back to ASIST for further diagnostic and repair information.
Step B: Reprogram the ECM
Vehicle ECU 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 4.
^ Use them as a "Quick Reference" for ECM reprogramming.
Step One: Download Reprogramming Data (Transfer) Data From ASIST Into CONSULT-II
1. Select vehicle model and model year (Example: Sentra 2003).
2. Select the correct reprogramming data:
a. Locate the specific "Model Configuration" (Example: CAL ASCD).
NOTE:
Model 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. (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 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 below, and number 3, DO NOT connect the CONSULT-II AC power supply.
2. Press [SUB MODE] (see Figure C) then:
a. From the listed items, find and select BATTERY [CHARGER].
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: 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 second, then
b. Turn the ignition switch "OFF" again for 10 seconds (see Figure D).
^ 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 DTC's that may have stored during the reprogramming procedure.
Step C: Perform A/F Sensor Test.
This is to make sure the A/F Sensor and Fuel Management System are functioning correctly.
1. Use CONSULT-II DATA MONITOR to view the following:
^ Engine Speed, and
^ A/F Sensor voltage (see Figure 2).
2. Hold the engine speed at about 2000 rpm no-load for 2 minutes.
^ This will create a "stable condition" for step 3.
3. Observe A/F SEN1 (B1) voltage for 30 seconds while holding 2000 rpm no-load.
a. A/F sensor voltage should remain (most of the time) between 1.37 and 1.57 volts.
^ If the engine rpm is held constant, voltage will fluctuate (change rapidly), but should remain in this range.
b. If, most of the time, the A/F Sensor voltage is out of this range:
^ The vehicle has an additional incident.
^ This bulletin does not have repair information for an A/F Sensor or Fuel Management System incident.
^ Go to ASIST for further diagnostic and repair information.