Engine Rpm Drops/Engine Stalls (01-033/06)

ENGINE RPM DROPS/ENGINE STALLS

TECHNICAL SERVICE BULLETIN

APPLICABLE MODEL(S)/VINS

2004-2005 Mazda3 vehicles with 2.0L A/T (Fed & Canada Spec)

DESCRIPTION

Some vehicles may experience an engine rpm drop or engine stall when slightly releasing the accelerator pedal during low speed driving with a half warmed-up engine. This is due to a an improper PCM calibration on Federal and Canada spec vehicles only. It does not include CA spec vehicles.

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 44.5 or later software, reprogram the PCM to the latest calibration (refer to "CALIBRATION INFORMATION " table) by following the "Module Reprogramming" procedure.
   CAUTION: If the vehicle is a Federal specification vehicle, you must select "No" when this screen appears to program the correct calibration for the U.S. Federal specification. If you select "Yes" you will program the vehicle with the Canada specification.
   Fig 1: Selecting No

   Courtesy of MAZDA MOTORS CORP.
   NOTE:

   • Always update the PDS/IDS tool first, then follow on-screen instructions to download the needed calibration file for PCM reprogramming.
   • It is not necessary to remove any fuses or relays during PCM reprogramming when the PDS/IDS screen prompts you to do so. You may accidentally stop power to one of the PCM terminals and cause the PCM 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.
   • Please be aware that PCM 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, 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 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 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 calibration information, your dealer code, and today's date.
   Fig 2: Authorized Modifications Label

   Courtesy of MAZDA MOTORS CORP.
5. Place the "Authorized Modifications" label on the "A" pillar below the tear tag in the driver door jamb.
   Fig 3: Authorized Modifications Label Placement

   Courtesy of MAZDA MOTORS CORP.

CALIBRATION INFORMATION

Engine	Transmission	New PCM Calibration Part Number	File Name
2.0L (Fed spec.)	A/T	LFG6-18-881E	SW-LFG6EE040
2.0L (Canada spec.)	A/T	LFZF-18-881A	SW-LFZFEA010

WARRANTY INFORMATION

Warranty Type	A
Symptom Code	06
Damage Code	9W
Part Number Main Cause	5555-06-027A
Quantity	0
Operation Number / Labor Hours	XXB396FX / 0.3 Hrs.