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Do you know how to do automotive electrical testing , with a volt meter . Check out videos on youtube basic automotive electrical testing . Do you have a scan tool ? That would be a good first step . Do you have any idea how many elctronic control modules are on your vehicle ? Do you know what a serial data communication network is . C.A.N How to Diagnose Controller Area Network CAN When you turn the key to start do you know what happens ?
Circuit Description (Key Start)
For ignition switch power modes refer to Body Control System Description and Operation . When the ignition switch is placed in the Start position a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the Start position. The BCM then sends a message to the powertrain control module (PCM)/engine control module (ECM) notifying it that CRANK has been requested. At the same time the BCM is supplying 12 volts for the IGN 1 relay closing it and supplying battery positive voltage for the crank relay coil. The PCM/ECM verifies that the transmission is in Park or Neutral. If it is, the PCM/ECM grounds the control circuit of the crank relay. When this occurs battery positive voltage is supplied through the switch side of the crank relay to the S terminal of the starter solenoid.
What you need to do is have it towed to the dealer !
Depends on the year. Older ones have an electric relay supplying 12v to the starter solenoid. A wire jumper from batter + to the non grounded relay coil connection will crank the motor
U must perform tracking diagnostic.Ceck spark (if u know how,by sparkplug plug and a wire close to grounded part,whatch for electrical shoque,must use gloves)Ceck fuel supply (u can supply fuel directly to see if sttarts).Last:Bad timing.
All the battery does is supply power to the starter to crank the engine over.
The alternator doesn't start working until after the engine is started. It supplies electrical power to the engine after it has started and also recharges the battery.
If the engine is cranking over but not starting it is neither the alternator or the battery.
Check for spark and fuel pressure your most likely missing one of these.
first check the supply from fuel pump,most probably the fuel pump problem disconnected or filter ,if not check electrically spark plugs by removing one and turn engine if spark come on so no problem electrically.
There is an ECM to control the starting and running of the engine but it seldom is the problem.
First you need to isolate if it is mechanical, electrical or fuel that is causing the problem.
Remove the distributor cap and crank the engine, if the rotor turns, we can skip mechanical.
Before checking any electricals, check if there are any blown fuses both under dash and hood.
Check for power supply to distributor Black/Yellow wire with ignition switch on. If there is, pull 1 plug wire out and insert a plug to its end and ground it on the engine, NEVER groud it to the battery terminals.
Crank the engine and if you see blue sparks it is ok, reddish or yellow sparks means the coils is bad.
If no sparks, the ICM is faulty.
Test for power supply to fuel pump at initial ignition switch turned on, (2 seconds only) and while cranking. If none, the main relay is faulty. Take care
1. check the battery if its charged or not by blowing the horn.
2. if the battery is ok try crank the engine if it doesnt crank then you have a starter problem.
3. after you crank the engine check if you have enough fuel on your tank.
4. if it wont start check the ignition system for electrical supply on your spark plugs and if everything fails you got to let a mechanic check your car.
You can electrical supply directly from plus battery to electrical starter solenoid. For that you must prepar an electrical wire. One end connected at the electrical starter solenoid, and another end directly on plus battery. If electrical starter crancks the problem is on electrical supply. If doesn't cranks then electrical starter is out of order and must be removed from engine and repaired! The most frequent problem of electric starters are carbon brushes used! Did you try this operation?
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