Scan Tool Testing and Procedures

FMEM is an alternate system strategy in the ECA designed to allow improved vehicle drive should one or more sensor inputs fail.
When a sensor input is perceived to be out-of-limits by the ECA, an alternative strategy will be initiated. The ECA will substitute a fixed in-limit sensor value and will continue to monitor the faulty sensor input. If the faulty sensor operates within limits, the ECA will return to the normal Engine Running mode (strategy).
The MIL ``Check Engine'' light will remain ON when the FMEM is in effect. Codes that have FMEM strategy are 01, 08, 09, 10, 13, 14, 15, 16, 17 and 70. The remainder of the codes do not utilize FMEM.