F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Engine Control Module: Reset Procedure
With EEC (OBD I System)
HOW TO CLEAR KEEP ALIVE MEMORY
The Powertrain Control Module (PCM) stores information about vehicle operating conditions and uses this information to compensate for component
tolerances. When an emission related component is replaced, Keep Alive Memory (KAM) may have to be cleared to erase the information stored by the
PCM from the original component.
To clear KAM: Disconnect the negative side of the battery for a minimum of five minutes.
After KAM has been cleared, the vehicle may exhibit certain driveability concerns. It will be necessary to drive the vehicle 10 miles or more to allow the
processor to relearn values for optimum driveability and performance. (Distance is dependent on the vehicle application.)
With EEC (OBD II-A System)
Description
The Powertrain Control Module (PCM) Reset allows the scan tool to command the PCM to clear all emission-related diagnostic information. When
resetting the PCM, a DTC P1000 will be stored in the PCM until all the OBD II system monitors or components have been tested to satisfy a drive
cycle, without any other faults occurring.
The following events occur when a PCM reset is performed:
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Clears the number of Diagnostic Trouble Codes (DTCs).
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Clears the DTCs.
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Clears the freeze frame data.
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Clears oxygen sensor test data.
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Resets status of the OBD II system monitors.
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Sets DTC P1000.
New Generation STAR (NGS) and Generic Scan Tool
Refer to the manufacturer's manual for specific instructions on how to perform PCM reset.
Resetting Keep Alive Random Access Memory (RAM)
Disconnect the battery ground cable for a minimum of 5 minutes. Resetting Keep Alive RAM will clear learned values the PCM has stored for
adaptive systems such as idle and fuel trim.
After Keep Alive RAM has been reset, the vehicle may exhibit certain driveability concerns. It will be necessary to drive the vehicle to allow the PCM
to relearn values for optimum driveability and performance.
