Step B - ECM Reprogramming
Step B: ECM REPROGRAMMINGVehicle ECM Reprogramming Overview
^ There are four basic steps
1. Download reprogramming data (transfer it) from ASIST into CONSULT-II.
2. "Preparation" steps before reprogramming.
3. Reprogram the vehicle ECM.
4. ECM Reprogramming "Wrap-up".
NOTE:
^ If you're not familiar with the latest ECM reprogramming procedures refer to "ECM Reprogramming For Nissan Vehicles" general procedure.
^ 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) Data From ASIST Into CONSULT-II
1. Select vehicle model and model year (Example: Titan, 2004).
2. Select the correct reprogramming data:
a. Locate the specific "Model Configuration" (Example: VK56DE, 5AT, VDC).
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 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) from ASIST into CONSULT-II.
Step Two: Preparation for Reprogramming ECM
1. Connect a battery charger to the vehicle's battery.
^ Set the charger to a low charger rate (trickle charge).
CAUTION:
For steps 2 and 3 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.)
CAUTION:
If the "Charger Input" is below 12 volts:
^ A list of items to check when "Charger Input" voltage is below 12V is contained in the "ECM Reprogramming For Nissan Vehicles" general procedure.
Step Three: Reprogram the Vehicle 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 second, then
b. Turn the ignition switch "OFF" again for 10 seconds (see Figure E).
^ 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 the MIL comes ON, use CONSULT-II with the Diagnostic (red/white) Card to erase any DTC's that may have stored during the reprogramming procedure.