> Relays and Modules > Relays and Modules - Instrument Panel > Speedometer Module > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Speedometer Module: > 00-14-2 > Jul > 00
> Speedometer Defective,, 4X4 Lamp ON, DTCs P1635/P1639
Speedometer Module: All Technical Service BulletinsSpeedometer Defective,, 4X4 Lamp ON, DTCs P1635/P1639
Article No.00-14-2
Date7/10/00
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DIAGNOSTIC TROUBLE CODE (DTC) - P1635 AND/OR P1639 PRESENT AFTER POWERTRAIN CONTROL MODULE (PCM) ORINSTRUMENT CLUSTER REPLACEMENT - GASOLINE ENGINE VEHICLES ONLY
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LAMP - 4X4 LAMP ILLUMINATED AFTER POWERTRAIN CONTROL MODULE (PCM) OR INSTRUMENT CLUSTER REPLACEMENT -GASOLINE ENGINE VEHICLES ONLY
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SPEEDOMETER - INACCURATE AND/OR INOPERATIVE AFTER POWERTRAIN CONTROL MODULE (PCM) OR INSTRUMENTCLUSTER REPLACEMENT - GASOLINE ENGINE VEHICLES ONLY
FORD: 1999-2000 MUSTANG, EXPEDITION, F-150, F-250 2000 ECONOLINE
LINCOLN: 1999-2000 TOWN CAR, NAVIGATOR
This TSB is being republished in its entirety to update the vehicles affected.
ISSUE
Some vehicles may exhibit an inoperative or inaccurate speedometer, 4X4 lamp illuminated, and/or Diagnostic Trouble Codes (DTCs) P1635 or P1639present after a Powertrain Control Module (PCM) or instrument cluster replacement.
ACTION
This may be caused by the PCM Vehicle Identification (VID) block not being updated. The following Service Procedure should be used along with theWorldwide Diagnostic System (WDS) to update the VID block.
SERVICE PROCEDURE
1. To perform this procedure, turn on WDS, wait for full boot-up and undock WDS.
2. Enter user information (will need to have blue car icon at top of screen).
3. Select "16 pin", all except those below, press tic.
4.
Make connections as shown, press tic. WDS will display the message "Network Test or Running Data Collection" in the bottom box. Whenfinished, it will display the vehicle configuration; select yes if correct.
5. Enter or skip vehicle/dealer information and press tic.
6. Select the toolbox from the icon menu.
7. Select Module Programming and press tic.