6 V6-3.0L DOHC (2003)
Control Module: All Technical Service Bulletins
Engine/Transmission Controls - 1 - 2 Shift Shock
05-005/05 2003 - 2004 MAZDA6 3.0L - 1 - 2 SHIFT SHOCK
APPLICABLE MODEL(S)/VINS
2003-2004 Mazda6 3.0L vehicles with automatic transmission
DESCRIPTION
Some vehicles may exhibit 1-2 slippage and shift shock during moderate acceleration in D range. Also, slippage, excessive harsh shifting, and shift shock
may occur when the gear select lever is manually shifted from 1st to 2nd gear around 5000 RPM.
This concern is caused by driven plate deformation due to a rapid rise in temperature in the 2-4 brake driven plate when repeated shifting is done with a
cold engine.
To eliminate this concern, the TCM logic has been changed to improve shift feel. The PCM logic has also been changed to prevent an abnormal rise in
2-4 brake driven plate temperature.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1.
Reboot the WDS PTU to clear memory before reprogramming.
2.
Using WDS B35 or later software, reprogram the PCM and TCM to the latest calibration (refer to "Calibration Information" table) by following
the "Module Reprogramming" procedure.
NOTE:
^
Always update the WDS PTU first, then install the needed calibration file that WDS shows during PCM and TCM reprogramming. Go to
"WDS Calibration" on ESI and download the "update" file. If the PTU is not updated to the latest WDS calibration level, the calibration
file will not install into the PTU.
^
It is not necessary to remove any fuses or relays during PCM and TCM reprogramming when the WDS screen prompts you to do so. You
may accidentally stop power to one of the PCM or TCM terminals and cause the PCM or TCM to be blanked, or you may receive error
messages during the WDS reprogramming procedure.
^
WDS shows the calibration part numbers afier programming the PCM and TCM.
^
Please be aware that PCM and TCM calibration part numbers and file names listed in any Service Bulletin may change due to future
releases of WDS software, and additional revisions made to those calibrations for service related concerns.
^
When reprogramming a PCM or TCM, WDS will always display the "latest" calibration P/N available for that vehicle. If any calibration
has been revised/updated to contain new information for a new service concern/issue, it will also contain all previously released
calibrations.
^
When performing this procedure, if the WDS PTU is not docked and connected to 115V-120V, we recommend that a battery charger be
installed on the vehicle battery and turned ON to a maximum charge of no more than 20 AMPS to keep the vehicle battery up to capacity.
If you exceed 20 AMPS, it will damage the WDS PTU. Also the external battery power supply cable should be connected to the vehicle
battery and the PTU.
3.
After performing the PCM and TCM reprogramming procedure, verify the repair by starting the engine and making sure there are no MIL
illumination or abnormal warning lights present.
NOTE:
^
If any DTCs should remain after performing DTC erase, diagnose the DTCs according to the appropriate Troubleshooting section of the
Workshop Manual.
^
After PCM and TCM reprogramming, it is no longer necessary to road test the vehicle to "relearn" KAM (Keep Alive Memory).
4.
Place an "Authorized Modification" label (P/N 9999-95-AMDC-97) with the new calibration information on the "A" pillar above the tear tag in
the driver doorjamb.
