Checksum base address

Definition: You will get code 512/15 if you haven't set CHECKSUM_BASE_ADDRESS to "0" with the tuner,the processor thinks there is a fault when anything is attached to the J-port.

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Description: This is Ford’s internal program checksum designed to verify that the original EEC program is correct. If set to 0 you disable the checksum and the fault code 15 ROM test failed is not displayed during a KOEO or KOER test of the EEC.

Hints:

CHECKSUM_BASE_ADDRESS - This is the starting address used to calculate a checksum on the ROM. The checksum test processes blocks of code until it reaches a base address that is 0. Set this value to 0 to remove KOEO error code 15 (checksum test error). The ROM checksum is valid only on the stock calibration—Once you change anything, the checksum is invalid and error code 15 is generated. It is not known if the presence of error code 15 effects PCM operation—such as not storing keep-alive memory.