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The logged advance multiplier (IAM) value is between 0 and 1 on some cars and between 0 and 16 on others. Why?

April 26, 2017cars IAM logged multiplier value

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The logged advance multiplier (IAM) value is between 0 and 1 on some cars and between 0 and 16 on others. Why?

1 Answer

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16-Bit and 32-bit ECUs store this value differently although the function of this parameter is the same. Multiply the 32-bit ECU’s value by 16 to compare to the 16-Bit ECU. Divide the 16-Bit ECU’s value by 16 to compare to the 32-bit ECU.