I was driving on the hwy at about 60 mph in my 2006 chevy cobalt ss supercharged with the cruise control on, all of of sudden it went off by itself, turned it back on, again after a few seconds went off, tried a 3rd time same thing, 4th time would not go back on. Then next day took car out in morning still did not work, later in the day went to start the car, nothing happens at all, will not start, only hear the relays clicking. Any idea what it would be? There was 1 - 2 amp ignition fuse blown inside the car, replaced, still nothing. Took all the fuse box apart inside engine compartment, all looks good???? got power in fuse box. tried jumping the starter, starter works but still will not start with key in on position when jumping starter. Guess cannot start these cars by push starting either? All light in dash come on properly when key is in on.
The key is chiped , does it have a padlock an car symbol light on the instrument cluster when you turn the key on ? Do the headlamps work ? shine bright ? Do you have a volt meter ? Check battery voltage . Go to http://www.bbbind.com/free_tsb.html free wiring diagrams . Enter vehicle info. year , make , model an engine size . Under system click on electrical distribution , under subsystem click on power distribution . Check power at the crank relay , plus you need to know what happens when you turn that key to start . Computers involved .Do you know about relays ?
Moving the ignition switch to the START position signals the body control module (BCM) through discrete inputs from the ignition transducer that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the engine control module (ECM)/powertrain control module (PCM) requesting engine start. The ECM/PCM receives a 12-volt signal from the park/neutral position (PNP) switch or clutch pedal start switch notifying that it is safe to start the engine. There is a splice on this circuit in the fuse block-underhood that supplies power for the starter relay coil. The starter relay coil control circuit is then grounded by the ECM/PCM closing the switch in the starter relay suppling 12 volts to the S-trminal of the starter. Ground is supplied through the engine block.
A scan tool of professional type would be a good tool to have to diagnose this .
The vehicle theft deterrent (VTD) system functions are provided by the theft deterrent module (TDM). When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the TDM. The TDM then compares this value to a value stored in memory. This is the learned key code. If the value is correct, the TDM sends a random generated number to the transponder. This is called a challenge. Both the transponder and the TDM module perform a calculation on the challenge. If the calculations match, the TDM sends the start enable message via the serial data circuit to the engine control module (ECM). If either the transponders unique value or the calculation to the challenge is incorrect, the TDM will send the start disable message to the ECM via the serial data circuit. The components of the VTD system are as follows:
• TDM
• ECM
• Ignition key (Transponder)
• Ignition lock cylinder
• Security indicator
Is the light on . when trying to start the vehicle ?
SOURCE: 2006 chevy cobalt woulnt start lock light is on
Are you using the original key that came with the car? The chip in that key may have gone bad. Try using the spare key that should have come with the purchase of the car. You may also be having battery issues. If all else fails....call the people who really know how to rape you...DUM Dum dummmmm....the dealer
SOURCE: (ENGINE won't TURNOVER) Just a "click" then nothing...
The reason car batteries do that is because the battery only runs your accessories and starts the car. The alternator runs the vehicle and charges the battery once it is started. If the battery is failing the charge provided by the alternator runs your accessories and the leftovercharge is displaced into the dead battery.
Testimonial: " Thanx for solving one of the "great mysteries" of the auto (to me), "Smokey"! (Do either of you make road calls?) :-)"
SOURCE: 2003 Lincoln Town Car. intermittent starting. Have
Can you provide an email address where I can send some diagrams. This site only allows images smaller than 150k. Thanks
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Do not believe the key is chipped, tried the spare, nothing happens
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