ECM & Tcm Reprogramming Procedures
Vehicle Reprogramming Overview for This Incident.^ There are six basic steps.
Step 1: Download reprogramming data (transfer it) from ASIST into CONSULT-II.
Step 2: Preparation for reprogramming.
Step 3: Reprogram the ECM (if needed, as decided in Chart A).
Step 4: ECM reprogramming "Wrap-up" (only if ECM reprogramming is done).
Step 5: Reprogram the TCM.
Step 6: TCM reprogramming "Wrap-up".
--> If you are familiar with special TCM and ECM reprogramming using I.D. Code entry:
^ Review Steps one through six-starting.
^ Use them as a "Quick Reference" for ECM and TCM reprogramming.
Step One: Download (Transfer) Data From ASIST into CONSULT-II
1. Click on the Key pad button (see Figure A).
^ A Keypad will pop up, left side of screen.
2. Using the digit keys on the keypad, enter the correct ASIST ECU DATA ID CODE.
^ Go back to Chart A in this bulletin.
3. Then click the "Continue" button on the keypad.
^ One ECM and one TCM data file will appear in the center of the ASIST screen.
4. Now you'll add reprogramming data to the "File(s) selected" list. This list is on the right side of the ASIST screen (Figure A, above).
A. Click on the "To" number for the TCM data (it's in the center of the ASIST screen).
B. Then click on the "Add" button.
If ECM reprogramming is needed (see Chart A ):
C. Click on the "To" number for the ECM data (it's in the center of the ASIST screen).
D. Then click on the "Add" button again.
5. Write the "To" number(s) on the Repair Order. You will need this later in the reprogramming process.
6. Click the "CONTINUE" button to start the CONSULT-II setup.
Step Two: Preparation for 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 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 'Special ECM Reprogramming Procedure For ECM ID Entry" general procedure.
^ Or refer to it in the print copy of this bulletin.
Step Three: Reprogram the ECM (if needed)
^ You should have determined if ECM reprogramming is needed by looking at Chart A.
If ECM reprogramming is ~not needed, go to Step Five.
Step Four: ECM Reprogramming "Wrap-up" (only if ECM reprogramming is done)
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 Electronic 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 Five: Reprogram the TCM
^ You're ready to do TCM reprogramming when you have completed steps One and Two.
Step Six: TCM Reprogramming "Wrap-up"
1. Turn the ignition and CONSULT-II OFF.
2. Disconnect CONSULT-II from the vehicle.
3. Start the Engine and make sure the MIL is OFF.
^ If it is ON, use CONSULT-II with the Diagnostic (red/white) Card to erase any DTC's that may have stored during the reprogramming procedure.
4. Test-drive the vehicle and make sure the transmission operates correctly in all modes. See the AT section of the appropriate ESM for shift schedule specifications.