Service Procedure
SERVICE PROCEDURE:CAUTIONS DURING REPROGRAMMING
1. Make sure the battery has reasonable charge. If the vehicle has been in storage for several days run the engine at idle for at least 10 minutes to assure an adequate battery charge state for reliable reprogramming results.
2. Perform reprogramming with the ignition key in the ON position.
3. Turn off all lights (Do not leave headlight switch in auto mode.) and all accessories (including heater/air conditioner/blower, radio, heated seats, rear defroster, etc.) to make certain the battery will not be discharged during reprogramming.
4. Be careful not to disconnect any cables connected to the vehicle or the GDS during reprogramming.
5. Do not start the engine during reprogramming.
6. Do not turn the ignition switch OFF during reprogramming.
ECM REPROGRAMMING PROCEDURE:
GDS INSTALLATION PROCEDURE
WARNING:
Make sure that the battery symbol indicator at the bottom right tray of the GDS laptop shows at least 25% 50 there will be enough power to complete the reprogram; if it has less, charge the GDS laptop by connecting the power adaptor cable to it for at least 1A hour or leave it connected for the reprogram procedure if possible.
1. Connect the USB cable between the GDS laptop USB port and the VCI.
NOTE:
When performing the reprogramming using the GDS, wireless communication between the VCI and GDS laptop cannot be used; you must connect the USB cable between the GDS laptop and the VCI.
2. Connect the VCI cable to the vehicle's DLC connector; to access the vehicle's connector you must remove the front cover below the steering wheel to the left.
3. Turn on the VCI and GDS laptop, and then perform reprogramming in accordance with the instructions of the below procedure:
ECM AUTOMATIC REPROGRAMMING PROCEDURE
Internet Update:
Touch the Internet Update to check that your GDS has Local Version 1.35 or higher.
Here's an example of an Internet Update available to Server Version 1.23 with the current GDS Local Version at 1.20 so the Download Start button is available to conduct an internet update as shown.
1. Enter the vehicle information either automatically by pressing the VIN Auto Detect button or if it does not work then enter manually the vehicle model, model year, and select ENGINE as the system: Select the OK button.
2. Select ECU Upgrade as shown.
3. Select Auto Mode then ENGINE at the left ECU Upgrade column and you will see the screen above.
4. After touching OK it will read the ROM ID as shown.
5. After the Current ROM ID is displayed select the appropriate upgrade event based on vehicle model and engine:
^ Upgrade Event # 98. ECM T48 UPDATE
6. After selecting the Upgrade button select OK at the TSB confirmation screen.
7. The vehicle battery voltage is checked to make sure it's at least 12 volts as required to assure reliable reprogramming results. Select OK at this screen if the results indicate Voltage is OK.
WARNING:
If voltage is below 12 volts then touch Cancel; run the engine for 10 minutes at idle and touch OK again at the previous screen to check that battery voltage then exceeds 12 volts.
NOTE:
IF IT IS A VEHICLE THAT IS EXPECTED TO REMAIN IN STORAGE POTENTIALLY FOR WEEKS YOU SHOULD RUN THE ENGINE AT LEAST 20 MINS OR AS LONG AS NECESSARY TO ACHIEVE BATTERY VOLTAGE ABOVE 12.4 VOLTS TO PREVENT LONG TERM BATTERY DAMAGE FROM LOW STATE OF CHARGE.
8. Reprogramming will begin and progress of the reprogramming will appear on the bar graph until it reaches 100% on the bar graph but it is not finished quite yet; you must wait until the next screen which indicates reprogramming is complete.
As per instruction turn off the ignition key for at least 10 seconds then turn back on to finish.
Confirmation that ECM reprogramming is successfully finished as shown above.
9. Check for any engine or transmission section diagnostic trouble codes (DTCS) and erase any trouble codes present.
10. Turn the vehicle ignition switch OFF for about 20 seconds and then start the engine to confirm proper operation of the vehicle.
ECM MANUAL REPROGRAMMING PROCEDURE:
CAUTION:
^ Manual reprogramming must be performed only when automatic reprogramming fails.
^ If automatic reprogramming fails, turn the ignition switch OFF for about 20 seconds, place it back in the ON position and then perform manual reprogramming.
1. Within the ECU Upgrade screen select Manual Mode followed by ENGINE in the left column, then select Upgrade Event # 98. ECM T48 UPDATE and select OK.
2. Enter the appropriate Password from the above table and then select OK.
The remainder of the ECM Manual Reprogramming is identical to steps 6-10 of the ECM Automatic Reprogramming procedure.
TCM UPGRADE PROCEDURE:
TCM AUTOMATIC REPROGRAMMING PROCEDURE
1. Select on the left column Auto Mode then AT and select the OK button.
2. Select Upgrade Event: 97. TCM T48 UPDATE and select the Upgrade button.
3. Remaining Automatic Mode Reprogramming steps are same as steps 7-10 of the ENGINE Automatic Reprogramming procedure.
TCM MANUAL UPDATE PROCEDURE:
CAUTION:
^ Manual reprogramming must be performed only when automatic reprogramming fails.
^ If automatic reprogramming fails, turn the ignition switch OFF for about 20 seconds, place it back in the ON position and then perform manual reprogramming.
1. Select the option 97. TCM T48 UPDATE
2. Select the appropriate vehicle type and press ENTER.
3. Enter the appropriate password from the table shown above and press ENTER.
4. Remaining steps of the TCM Manual Reprogramming is same as steps 6-10 of the ECM Automatic Reprogramming procedure.