If you are talking about a Desktop Computer system, On the front of the CD drive is a very small hole. Insert the end of a paperclip into it and the drawer will open.
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You have a problem in the engine or transmission that is serious and to avoid further damaging of the components the powertrain computer has limited available power. You must now have the computer system scanned for fault codes, then based on the fault codes you perform diagnostics and repair the problems.
Did you check power an grounds using voltage drop testing , did you check battery voltage an computer control at the starter motor relay in the under hood fuse / relay box ? Instead of guessing you need to learn how to use a DVOM - digital volt ohm meter an test ! The powertrain control module controls the starter motor operation ! Starter Voltage Drop VEHICLE RELAYS Operation Diagnosis ,If you pull the relay an jump pin's 30 & 87 the starter should crank ,test the circuit starter motor side ! Pins 85 & 86 are the control side ., Pin 85 or 86 forget which one has battery voltage with the key on . The one with out voltage is control from the engine computer ! Also if the anti theft system is active it wont start !
Code 12 means the computer has lost memory since the last test, usually because the battery has been disconnected. Code 41 is a charging system problem.
Do you have power to the coil but no spark from the tower ?
If you know for a fact the cooling fan is why the engine overheats, you would test the relay and the signal from the computer. The relay gets power from the battery circuit and the key switch, and a ground signal from the computer when the fan is needed. The engine temp sensor tells the computer how hot the engine is, and when it reaches 220 degrees the computer grounds the relay providing power to the fan motor. You would need a meter or a test light and the wiring diagram for the circuit to find the problem.
This is a sign of inadequate power to the starter. This can be from a tired battery or corroded cable terminals at the battery, the input terminal of the starter or a corroded connection between the negative battery terminal or chassis to engine.
To prove it when you have it running use a spray bottle and spray around the wires starting at the distributor and lastly spray the coil tower. do this late at night then you can see the sparks and see why it is so affected by wet situations.
The failure is a crack in the coil tower.
RECOMENTADTIONs listed below:
1. Replace coil.
2. Use a old oil wire and cut away the wire insulator and slide under the existing coil wire all the way to the base.
3. Use black electrical tape and neatly wrap the coil tower.
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