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conversionconstants.jpg | Hits: 9585 | Posted on: 6/23/08 | View Low-Res

PSOM Conversion Constants for '92-96 F-series & Broncos

TSB 94-16-16 Speedometer Re-Calibration
Publication Date: AUGUST 10, 1994

LIGHT TRUCK: 1992-1994 AEROSTAR, BRONCO, ECONOLINE, F-150-350 SERIES, F-47

ISSUE: Some vehicles may have the Programmable Speedometer Odometer Module (PSOM) re-calibrated for a tire/axle combination that is not approved by Ford Motor Company/Ford Electronics Division.

ACTION: Refer to the appropriate Service Manual Section in the following chart for a comprehensive list of Ford Motor Company/Ford Electronics Division approved tire/axle combinations.



NOTE: FORD MOTOR COMPANY DOES NOT APPROVE OF THE USE OF ANY CONVERSION CONSTANTS OR TIRE/AXLE COMBINATIONS NOT LISTED IN THE CHARTS. RE-CALIBRATION OF THE PSOM'S CONVERSION CONSTANT MAY BE REQUIRED DUE TO A TIRE/AXLE CHANGE (NOT COVERED UNDER MANUFACTURER'S WARRANTY). THE CONVERSION CONSTANT IS A "NUMBER" USED BY THE PSOM TO SCALE OR INTERPRET THE PULSES PER MILE SENT FROM THE SPEED SENSOR SO THAT THE PSOM WILL RETAIN THE FACTORY SET ACCURACY. THE CONVERSION CONSTANT CAN BE CHANGED A MAXIMUM OF THREE (3) TIMES FOR THE 1992 MODEL YEAR VEHICLES AND A TOTAL OF SIX (6) TIMES FOR THE 1993-94 MODEL YEAR VEHICLES.

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Information Only

For other TSBs, check here.
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