A/T - Poor Shift Quality
No: TSB-98-23-002 REVDATE: July, 1998
MODEL: 1998 Eclipse A/T
SUBJECT:
POOR A/T SHIFT QUALITY (1998 MODELS)
This bulletin supercedes TSB-98-23-002, issued April, 1998, to correct the EATX III/Engine harness switch setting for reprogramming the TCU.
PURPOSE
The following possible shift concerns can be corrected by reprogramming the transmission control unit (TCU) with new software contained in reprogramming cartridge MIT992014 as described in this bulletin.
^ In cold ambient temperatures below 27° C (-16° F), the transaxle enters limp-in mode (stays in 2nd gear).
^ When ATF is 4° C (40° F) or below, excessively long shift from third gear to second gear when coasting or braking to a stop. If this occurs, the transaxle may not shift to first gear upon stopping, resulting in slight engine flare and/or sluggish acceleration when accelerating from the stop.
^ When ATF is 7° C (45° F) or below, engine "sags" (momentary lack of response) when driving between 9 - 27 mph at light throttle.
^ Delayed upshifts when driving uphill.
AFFECTED VEHICLES
1998 Eclipse 2.0L DOHC non-turbocharged automatic transmission models produced before 12/12/97
PROCEDURE
1. Using the MUT-II scan tool, check to see if any DTCs other than DTC 74 are set. Perform the appropriate necessary DTC diagnostic troubleshooting steps and repairs. Then go to Step 2 for TCU reprogramming instructions.
2. Gather the following equipment which is contained in Reprogramming Kit MIT992000-A:
Do not install the cartridge into the Reprogramming Unit at this time.
3. Attach the EATX III/Engine harness to the Reprogramming Unit. Refer to page 6 of the Reprogramming Unit Instruction Manual.
4. Set the switch on the harness black box to the side labeled EATXIII.
5. Connect the EATX III/Engine harness 16-pin and 12-pin connectors to the vehicle's data link connector.
6. Install Reprogramming Cartridge M1T992014 into the Reprogramming Unit.
7. Follow the displayed instructions on the Reprogramming Unit screen.
CAUTION:
DO NOT DISTURB THE HARNESS CABLES OR CONNECTIONS. INTERRUPTION DURING THE PROGRAMMING PROCESS COULD CAUSE THE TCU TO LOSE DATA OR PREVENT FUTURE TCU REPROGRAMMING.
8. The display will ask it you want to change the controller part number. Select Yes. Reprogramming will begin.
NOTE:
If the TCU has already been reprogrammed for this condition, the displayed current and replacement part numbers will be the same, or the message "BREAK NOT SEEN" will display. If so, do not continue with this procedure.
9. Current and replacement TCU part numbers will display. The replacement part number will be M05293008AG. Record the replacement part number displayed.
10. When completed, disconnect the reprogramming unit and the EATX III/Engine harness.
11. Using a ball-point pen, enter the replacement TCU part number (noted in Step 9), your dealer code, and the current date on the Control Module Label.
12. Remove the center console side cover to access the TCU. Affix the Control Module Label to the side of the TCU. Then reinstall the console side cover.
13. Using a ball-point pen, enter the replacement TCU part number, this TSB number (TSB-98-23-002), your dealer code, and the current date on the Engine Compartment Label.
14. 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