A/T Controls - Harsh Shifting
NUMBERJTB00040
MODEL
XJ S-TYPE
DATE
29 May 2007
THIS BULLETIN REPLACES PREVIOUSLY PUBLISHED XJ307-06 AND S307-17.
ENHANCED CALIBRATIONS IN THE LATEST SOFTWARE IMPROVE SHIFT QUALITY IN HIGH AMBIENT TEMPERATURES.
SECTION:
307-01
Harsh Transmission Shifts
AFFECTED VEHICLE RANGE:
XJ: S-TYPE
VIN: G00442 - G49700
VIN: M44998 - N52047
CONDITION SUMMARY:
SHIFT STRATEGY DRIFT CAUSES HARSH ENGAGEMENT
Situation:
The customer may complain of harsh shifting. The adaptive shift strategy can drift over time causing higher than normal clutch pressures.
NOTE:
The customer should be informed that after the adaption clearing procedure and re-configuration repair the transmission shift quality will improve over time as the transmission adapts to the customer's driving requirements.
Action:
Should a customer express concern about harsh shifts, improve the shift characteristic of the Transmission Control Module (TCM) by clearing the adaptions and reconfiguring the TCM using IDS DVD 106 patch file 3 or later.
PARTS
No parts required
TOOLS:
IDS DVD106 Patch File 3 or later
WARRANTY:
NOTE:
Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
Normal warranty policy and procedures apply.
REPAIR PROCEDURE
ADAPTION UPDATE PROCEDURE
CAUTION:
A Midtronics PSC-550 Vehicle Power Supply must be connected to the vehicle battery during diagnosis.
1. Connect the Midtronics PSC-550 power supply to the vehicle battery.
2. Ensure the ignition is switched "OFF", parking brake is "ON" and the transmission selector lever is in P (Park).
NOTE:
IDS must be loaded with software release DVD 106 with patch file 3 or later.
3. Connect the diagnostic tester to the vehicle and begin a new diagnostic session, by entering the correct VIN for the current vehicle.
4. Read and clear all DTCs.
5. Navigate to configuration main menu and select:
^ Special applications
^ Transmission control module Adaption Clear
^ Run "Application".
6. When the adaption clear has been carried out, select and run Re-configure existing TCM application from the configuration menu.
7. After the re-configuration of the TCM is complete, switch "OFF" tester and disconnect from the vehicle.
8. Carry out the adaption drive cycle road test as follows:
^ Ensure the vehicle is in normal mode (not sports mode) and the following conditions are met.
^ Conduct the test on a flat road.
NOTE:
The transmission fluid temperature must be above 60°C (140°F) and below 100°C (212 °F)
^ Ensure the vehicle is at normal operating temperature so that the transmission fluid temperature is above 60 deg C (140 deg f.
NOTE:
The accelerator pedal may not be moved during shifts.
CAUTION:
1-2, 2-3, and 3-4 shifts must occur with engine speed between the specified limits.
^ Accelerate from rest with light steady throttle without exceeding the following upper rev limits for shifting in the table.
^ Continue to accelerate gently to 50mph (80km/h) 50 that transmission shifts into 5th gear.
^ Go into overrun and let the transmission shift down into 4th gear without braking.
^ Brake gently to a standstill and hold footbrake on for at least 15 seconds.
9. Repeat the Step 8 procedure at least five times.
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