PCM - Reprogram to Correct Engine Stall Condition
NO: TSB-99-13-005DATE: July, 1999
MODEL: 1999 Galant
SUBJECT:
PCM REPROGRAMMING FOR ENGINE STALL
PURPOSE
Some affected vehicles may experience engine stall at low engine speeds. This is caused by incorrect PCM software parameters which cause the purge solenoid to activate at low speeds. Reprogramming the PCM as described in this bulletin will change the purge solenoid activation timing.
All affected vehicles in dealer stock must be reprogrammed.
IMPORTANT
ROM packs are updated as needed, depending on vehicle repair requirements for PCM software updates. When a ROM pack is updated, it integrates current PCM updates with previous PCM updates. For example, if you have a ROM pack with the latest database number, it will repair the vehicle condition in the current reprogramming TSB as well as in previous reprogramming TSBs for the same model.
The ROM pack in this bulletin is used for correcting DTC P0120 (refer to TSB-98-13-013REV), 3-2 shift shock (refer to TSB-99-23-001), and engine stall at low speeds. You must check the database number on the ROM pack against the database number in the TSB to ensure it has the latest software update to correct the vehicle condition.
AFFECTED VEHICLES
1999 Galant models equipped with 2.4L engine
PROCEDURE
! CAUTION
BATTERY VOLTAGE (AS MEASURED AT THE BATTERY POSTS WITHOUT ELECTRICAL LOAD) MUST BE 12.4V OR HIGHER IN ORDER TO REPROGRAM THE PCM.
1. Using the MUT-II scan tool, check to see if any DTCs are set in the PCM. If any DTC is set, follow the appropriate DTC troubleshooting and repair instructions in the service manual. Then go to Step 2.
2. Use the MUT-II to erase all DTCs set in the PCM.
3. Gather the following reprogramming equipment:
4. Turn the ignition key to OFF and disconnect the MUT-II.
5. Install the red label interface cartridge to the MUT-II. Then install the red memory card and the red label ROM pack. Be sure to use the ROM pack with Database No. RN99051.
6. Connect the MUT-II to the vehicle. Connect BOTH the 16-pin and the 12-pin data link connectors.
7. Turn the ignition key to ON.
! CAUTION
DO NOT DISTURB THE HARNESS CABLES OR CONNECTIONS. INTERRUPTION DURING THE PROGRAMMING PROCESS COULD CAUSE THE PCM TO LOSE DATA OR PREVENT FUTURE PCM REPROGRAMMING.
8. Select MFI, and press "YES".
9. It the PCM has already been reprogrammed, the MUT-II will display this screen.
NOTE:
The MUT-II will first display a "SUM CHECKING" message for a few seconds, indicating that the scan tool is verifying the ROM-ID.
It this screen is displayed. STOP! Do not continue with this procedure.
10. If the PCM is unable to be reprogrammed, the MUT-II will display this screen.
NOTE:
The MUT-II will first display a "SUM CHECKING" message for a few seconds, indicating that the scan tool is verifying the ROM-ID.
Verify that the correct ROM pack is installed. It the correct ROM pack is installed. and this screen is displayed. replace the PCM. Record this MUT-II screen information and the ROM pack database number on the repair order. Do not reprogram the new PCM, as it already has the updated software.
11. If the PCM can be reprogrammed, this screen will display. Press "YES".
12. The MUT-II will display this screen as it reprograms the PCM. It will take a few minutes to complete.
! CAUTION
DO NOT DISTURB THE HARNESS CABLES OR CONNECTIONS. INTERRUPTION DURING THE PROGRAMMING PROCESS COULD CAUSE THE PCM TO LOSE DATA OR PREVENT FUTURE PCM REPROGRAMMING.
13. Press "C".
14. Turn the ignition key to OFF. Reprogramming is complete.
To verify that the correct reprogramming has been made, the ROM ID number will display on the MUT-II screen. The table shows the vehicle models and their appropriate ROM ID and vendor numbers that display after reprogramming.
* If the ROM ID number for the A/T side is lower than this number, you must reprogram the A/T side of the PCM using the same ROM pack. Repeat Steps 4-14, but select "ELC-A/T" instead of "MFI".
15. Using a ball-point pen, enter the appropriate PCM part number, vendor number, ROM ID #, this TSB number (TSB-99-13-005), your dealer code, and the current date on the Engine Compartment Label.
NOTE:
If the Engine Compartment Label does not provide a space for the vendor number and ROM ID #, write this information in as shown.
NOTE:
The "Control Module" label will not be used for this bulletin. Discard this label.
16. Carefully remove all dirt and oil from the vacant area shown on the underside of the hood. Affix the Engine Compartment label in the area shown.
WARRANTY INFORMATION
PCM Reprogramming
Nature Code: 99D Cause Code: 990
Labor Operation No. 13851510 Time Allowance: 0.3 hr.
Warranty Coverage: 36 months/36,000 miles.
Special Warranty Information: Normal warranty procedures apply.