Diagnostic Aids

If the VIN mismatch is corrected the odometer will once again be displayed on the P53 Driver Information Display. The P53 Driver Information Display does not store any odometer information, it only serves as the display for the A11 Radio. If the vehicle is driven for a calibrated distance with a VIN mismatch, it will cause the Radio odometer value to enter into an error mode and lock itself. When this occurs the dashes will remain on the display even after correcting the VIN mismatch. The vehicle odometer status data display on the scan tool can be used to identify a locked odometer. The only way to unlock the displayed odometer value (clear the dashes from the display) is to perform an SPS programming event. Failure to follow the diagnostic and programming procedures may result in either an improper odometer value or a module replacement.