PCM - Hard Start/Multiple Driveability Complaints
Article No.99-26-1
12/27/99
^ HESITATION/STUMBLE - DURING ACCELERATION
FROM LOW SPEED - VEHICLES BUILT FROM
3/15/1999 THROUGH 12/1/1999
^ LONG CRANK - VEHICLES BUILT FROM 3/15/1999
THROUGH 12/1/1999
^ MALFUNCTION INDICATOR LAMP ILLUMINATION -
ENGINE MISFIRE - VEHICLES BUILT FROM 3/15/1999
THROUGH 12/1/1999
^ SURGING - DURING LIGHT LOAD, STEADY SPEED
DRIVING - VEHICLES BUILT FROM 3/15/1999
THROUGH 12/1/1999
^ TRANSMISSION - 5R55N - HARSH ENGAGEMENT -
VEHICLES BUILT FROM 3/15/1999 THROUGH
12/1/1999
^ TRANSMISSION - 5R55N - HARSH OR DELAYED
SHIFTS - VEHICLES BUILT FROM 3/15/1999
THROUGH 12/1/1999
LINCOLN-MERCURY:
2000 LS
ISSUE
Some vehicles may exhibit one or more of the following engine or
transmission symptoms:
^ Harsh engagements
^ Harsh or delayed shifts
^ Light surging during light load, steady speed driving caused by occasional misfires (Malfunction Indicator Lamp (MIL) illuminated for the misfire)
^ Run-on feel or insufficient engine braking during decelerations
^ Occasional long start times
^ Occasional hesitation or stumble during acceleration from low speeds
These concerns may be attributed to a calibration concern.
ACTION
Reprogram the Powertrain Control Module (PCM). Refer to the following Service Procedure for details.
SERVICE PROCEDURE
Follow normal diagnosis and determine if one or more of the following conditions are present.
TRANSMISSION
^ Engagements in Drive or Reverse
^ Harsh or delayed
^ Inconsistent feel
^ Repeated harsh engagement from D-R, R-D at an idle stop
^ Harsh or delayed shifts
^ Harsh backout shifts
^ 3-2 manual downshifts long and intermittently harsh
^ Kickdown/backout shifts through 3rd are slow
^ Intermittent harsh converter engagements with Select Shift Transmission (SST) option only
^ 2-1 downshift cycling at a stop with SST option only.
ENGINE
^ Light surging during light load, steady speed driving caused by occasional misfires (MIL illuminated for the misfire)
^ Run-on feel or insufficient engine braking during decelerations
^ Occasional long start times
^ Occasional hesitation or stumble during acceleration from low speeds
1. If the concerns are present, determine if the problems are due to a component concern.
2. If a part or parts are the cause of the concern, repair as required.
3. Clear codes and validate the repair.
4. If the concern returns or if parts are not the cause of the concern, the processor must be re-flashed.
5. Using New Generation Star (NGS) Tester, Service Bay Diagnostic System (SBDS), or Worldwide Diagnostic System (WDS), access the PCM identification function to obtain the PCM part number.
6. Use the PCM part number to identify the vehicle's existing calibration by referring to the PCM Reprogramming Information Chart.
7. Once the existing calibration has been identified, reprogram the PCM to the latest calibration revision level using NGS Tester, SBDS or WDS.
Obtain an Authorized Modifications Decal (FPS 5262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emission Warranty Coverage
OPERATION / DESCRIPTION / TIME
DEALER CODING
OASIS CODES: 206000, 501000, 502000, 503000, 602300, 611000, 611500, 612000, 612600, 698298