I'm going to send you the schematic for the systemCustomer and you'll see why I have asked the questions that I did.
You'll notice that the Eng Ctrl, AC CRUISE both receive their power from the Ignition relay.
The Ignition Relay is also located in the same Underhood Electrical Center 2 where the Eng Ctrl fuse is located.
If the power source for Eng Ctrl fuse is missing, then either the relay is malfunctioning, or the primary side to the Ignition Relay is not being energized.
The Relay primary side receives its power directly from the pink wire at the ignition switch. This tells me that you may have an Ingnition switch failing, or the connections at the switch may be intermittant.
The other power source to check is the secondary Ignition Relay power source. If the Red wire to the Relay is Intermittant, then there is a possiblity of a fuse link problem.
Focus on the Ignition Switch Electrical portion of the switch and possible switch intermittant failure or the Ignition Relay. The electrical portion of these ignition switches can and do fail.
This information should be all that you need to isolate your problem. If you can't see a problem, you may need to wait for the problem to happen in order to isolate it.
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