Engine Controls - Engine Stalls When Releasing Throttle
TSB: 01-030/062005 MAZDA6 3.0L
DURING SLOW SPEEDS ON QUICK ACCELERATION ENGINE RPM DROPS, ENGINE STALLS OR DELAYED THROTTLE RESPONSE
NOTE:
This bulletin replaces 01-022/05. Please update your records accordingly.
BULLETIN NOTE
This bulletin supersedes the previous bulletin 01-022/05, issued on 09/13/05. The DESCRIPTION and REPAIR PROCEDURE information has been revised.
APPLICABLE MODEL(S)/VINS
2005 Mazda6 3.0L
DESCRIPTION
Some vehicles may experience the following symptoms:
^ Drop in engine rpm or engine stalling when quickly releasing the accelerator pedal during light acceleration or constant speed driving.
^ Delayed throttle response when quickly depressing the accelerator pedal during a very slow speed after engine warm-up.
Revised PCM and TCM calibrations are available to address this concern.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Reboot the PDS/IDS to clear memory before reprogramming.
2. Using PDS/IDS 41 or later software, reprogram the PCM ONLY (M/T equipped vehicles), or PCM and TCM (A/T equipped vehicles) to the latest calibration (refer to "Calibration Information" table) by following the "Module Reprogramming" procedure.
CAUTION:
(A/T EQUIPPED VEHICLES): BOTH PCM AND TCM MUST BE REPROGRAMMED to properly repair this concern. If only PCM or TCM is reprogrammed, customers may experience very poor shift quality/transmission operation, and/or driveability concerns.
NOTE:
^ Always update the PDS/IDS tool first, then follow on-screen instructions to download the needed calibration file for PCM or TCM reprogramming.
^ It is not necessary to remove any fuses or relays during PCM or TCM reprogramming when the PDS/IDS 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 PDS/IDS reprogramming procedure.
^ PDS/IDS shows the calibration part numbers after programming the PCM or 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 PDS/IDS software, and additional revisions made to those calibrations for service related concerns.
^ When reprogramming a PCM or TCM, PDS/IDS 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, 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 could damage the VCM.
3. After performing the PCM or 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 or TCM reprogramming, it is no longer necessary to road test the vehicle to "relearn" KAM (Keep Alive Memory).
4. Fill out an "Authorized Modifications" label (P/N 9999-95-AMDC-97) with the new PCM and/or TCM calibration information, your dealer code, and today's date.
5. Place the "Authorized Modifications" label on the "A" pillar below the tear tag in the driver door jamb.
TCM CALIBRATION INFORMATION
NOTE:
The PCM Calibration Part Numbers listed above are provided for PCM reprogramming purposes only.
These are not necessarily the same Mazda part numbers used to order an actual PCM through the Mazda Parts System. It is not necessary to order a PCM as part of this repair procedure.
WARRANTY INFORMATION
NOTE:
^ This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair. Refer to the Warranty Wizard for warranty term information.
^ Additional diagnostic time cannot be claimed for this repair.
Disclaimer