Engine Controls - Slow Acceleration Upon Cold Start-Up
Group: ENGINE ELECTRICALNumber: 03-36-013
Date: JUNE, 2003
Model: 2001 XG300
Subject:
2001 XG3OO ECM REPROGRAMMING
TO IMPROVE ACCELERATION AFTER
AN INITIAL COLD START
DESCRIPTION:
Some 2001 XG300 vehicles may experience the following symptoms:
^ Slower than usual acceleration after an initial cold start.
^ The condition lasts for a short time (usually less than a minute).
^ The condition occurs mostly in the summer (hot and humid weather conditions). This bulletin describes the procedure for updating the ECM software with new logic to improve the above condition by using the Hi-Scan Pro.
VEHICLES AFFECTED:
^ Model: 2001 XG300
^ Affected vehicle production date range: Produced through August 31, 2001.
ECM SPECIFICATION TABLE:
CAUTIONS BEFORE REPROGRAMMING:
1. Conduct reprogramming with the ignition key in the "ON" position.
2. Be careful not to disconnect any cables connected to the vehicle or Hi-Scan Pro during reprogramming.
WARNING:
If reprogramming is interrupted, the manual update procedure must be used.
3. Do not start the engine during reprogramming.
4. Do not turn the ignition key off during reprogramming.
ECM REPROGRAMMING PROCEDURE:
NOTE:
Verify that the vehicle is affected by identifying the vehicle production date.
AUTOMATIC UPDATE PROCEDURE:
1. Remove the Data Link Connector (DLC) cable from the Hi-Scan Pro and attach the reprogramming adapter.
2. Connect the red 10-pin adapter to the reprogramming adapter.
3. Remove the current software card from the Hi-Scan Pro and insert the reprogramming software pack card into the Hi-Scan Pro.
4. Insert the Hi-Scan Pro cigarette power adapter.
5. Plug the power connector from the reprogramming adapter into the cigarette adapter.
6. Plug the power connector from the cigarette adapter into the Hi-Scan Pro.
7. Connect the red 10 pin connector from the reprogramming adapter into the white connector next to the DLC located under the driver's side instrument panel.
8. Turn the ignition to the ON position.
9. Turn the Hi-Scan Pro ON and press ENTER.
10. Select option "28. XG 300 COLD STUMBLE" and press ENTER.
11. Select option "01. XG 300 COLD STUMBLE [AUTO MODE]" and press ENTER.
This option automatically detects the ECM type and downloads the correct program.
12. Enter "1229" as the password for the automatic update mode and press ENTER.
13. The Hi-Scan Pro will establish communication and check the ECM ID. The Hi-Scan Pro will reprogram the ECM automatically.
NOTE:
The Hi-Scan Pro detects the current ECM ID and displays it for about 1 second.
14. The boot program will download first, then the main program and the interrupt vector program.
NOTE:
If the Hi-Scan Pro does not automatically download the program, use the Manual Update Procedure following this section.
WARNING:
Do not interrupt the reprogramming at any time. The ECM will be rendered inoperative if the program does not download completely.
15. The Hi-Scan Pro re-initializes the system.
16. When the "COMPLETED" message is displayed, the ECM reprogramming process is complete.
NOTE:
^ The new ECM ID is displayed when the new ECM software download process is complete.
^ Check the new ECM ID displayed on the Hi-Scan Pro screen to verify that the correct ECM software has been downloaded.
^ Refer to the ECM specification table shown in this TSB.
17. When the reprogramming is completed successfully, turn the ignition to the OFF position for 20 seconds and then start the engine to check for proper operation.
MANUAL UPDATE PROCEDURE:
NOTE:
In the event that option "01. XG 300 COLD STUMBLE [AUTO MODE]" fails to download the new ECM program, option "02. XG 300 COLD STUMBLE [ERROR MODE]" must be used.
1. Turn the ignition to the ON position.
2. Turn the Hi-Scan Pro ON and press ENTER.
3. Select option "28. XG 300 COLD STUMBLE" and press ENTER.
4. Select option "02. XG 300 COLD STUMBLE [ERROR MODE]" and press ENTER.
5. Select option "01. XG 300 COLD STUMBLE: 39110-39077" and press ENTER.
6. Enter "9077" as the password for the manual update procedure and press ENTER.
NOTE:
Input the correct password to prevent the Hi-Scan Pro from downloading the wrong ECM program.
7. The Hi-Scan Pro will reprogram the ECM automatically. Wait until the reprogramming is complete.
WARNING:
^ Do not interrupt the reprogramming at any time. The ECM will be rendered inoperative if the program does not download completely.
^ If the program does not download during the manual update mode, turn the ignition off for 2-3 minutes and try again.
8. The Hi-Scan Pro re-initializes the system.
9. When the "COMPLETED" message is displayed, the ECM reprogramming process is complete.
NOTE:
^ The new ECM ID is displayed when the new ECM software download process is complete.
^ Check the new ECM ID displayed on the Hi-Scan Pro screen to verify that the correct ECM software has been downloaded.
^ Refer to the ECM specification table shown in this TSB.
10. When the reprogramming is completed successfully, turn the ignition to the OFF position for 20 seconds and then start the engine to check for proper operation.
EXPLANATION OF ERROR MESSAGE:
1. "INVALID PASSWORD": Please enter the correct password.
2. "REPROGRAMMING ERROR, PLEASE WAIT FOR RETRY": An error occurred during reprogramming, the Hi-Scan Pro will retry reprogramming automatically.
3. "ALREADY REPROGRAMMED" or "INCORRECT TARGET ID": This reprogramming has previously been done on this vehicle or the ECM is not the type subject to this reprogramming procedure.
4. "REPROGRAM ERROR, PLEASE CHECK THE SYSTEM": In this case, you must reprogram manually after selecting the menu option "02. XG 300 COLD STUMBLE [ERROR]".
WARRANTY INFORMATION: