If you have a Grey key you already have an issue but it will not create a no spark condition, it will create a start and stall after 3 seconds when the controller shuts down the fuel system.
The "secret pin #" for the SKIM system is programmed into the
PCM and the SKIM module verifies the PIN against the Pin in the key transponder each time it is placed in the ignition.
If you replaced the
PCM and did not "flash" it for your vehicle your SKIM info and VIN info will be incorrect.
Chrysler is not showing anything related to ignition for a no start without codes.
They are saying that any "cranks but will not start" not related to fuel pressure issues will set fault codes.
The vehicle operates on the same principal as out
TD's.
The controller needs to see a Crank and Cam signal before it will actuate the ASD.
CAMSHAFT POSITION SENSOR - 2.4L
DESCRIPTION
The camshaft position sensor is mounted to the rear of the cylinder head. The sensor also acts as a thrust plate to control camshaft endplay Target Magnet - Typical
OPERATION
The
PCM sends approximately 9 volts to the Hall-effect sensor. This voltage is required to operate the Hall-effect chip and the electronics inside the sensor. The input to the
PCM occurs on a 5 volt output reference circuit. A ground for the sensor is provided through the sensor return circuit. The
PCM identifies camshaft position by registering the change from 5 to 0 volts, as signaled from the Camshaft Position sensor.
A target magnet attaches to the rear of the camshaft and indexes to the correct position. The target magnet has four different poles arranged in an asymmetrical pattern. As the target magnet rotates, the camshaft position sensor senses the change in polarity Target Magnet Polarity
The
PCM determines fuel injection synchronization and cylinder identification from inputs provided by the camshaft position sensor Camshaft Position Sensor - 2.4L
DOHC and crankshaft position sensor. From the two inputs, the
PCM determines crankshaft position.
The sensor input switches from high (5 volts) to low (0.30 volts) as the target magnet rotates. When the north pole of the target magnet passes under the sensor, the output switches high. The sensor output switches low when the south pole of the target magnet passes underneath.
CRANKSHAFT POSITION SENSOR - 2.4L
DESCRIPTION
The crankshaft position sensor mounts to the engine block below the generator and near the oil filter Crankshaft Position Sensor
OPERATION
The
PCM sends approximately 9 volts to the Hall-effect sensor. This voltage is required to operate the Hall-effect chip and the electronics inside the sensor. A ground for the sensor is provided through the sensor return circuit. The input to the
PCM occurs on a 5 volt output reference circuit that operates as follows: The Hall-effect sensor contains a powerful magnet. As the magnetic field passes over the dense portion of the counterweight, the 5-volt signal is pulled to ground (.3 volts) through a transistor in the sensor. When the magnetic field passes over the notches in the crankshaft counterwieght, the magnetic field turns off the transistor in the sensor, causing the
PCM to register the 5-volt signal. The
PCM identifies crankshaft position by registering the change from 5 to 0 volts, as signaled from the Crankshaft Position sensor.
The
PCM determines what cylinder to fire from the crankshaft position sensor input and the camshaft position sensor input. The second crankshaft counterweight has machined into it two sets of four timing reference notches including a 60 degree signature notch Timing Reference Notches - Typical From the crankshaft position sensor input the
PCM determines engine speed and crankshaft angle (position)
The notches generate pulses from high to low in the crankshaft position sensor output voltage. When a metal portion of the counterweight aligns with the crankshaft position sensor, the sensor output voltage goes low (less than 0.5 volts) When a notch aligns with the sensor, voltage goes high (5.0 volts) As a group of notches pass under the sensor, the output voltage switches from low (metal) to high (notch) then back to low.
ELECTRONIC IGNITION COIL - 2.4L
WARNING: THE DIRECT IGNITION SYSTEM GENERATES APPROXIMATELY 40,000 VOLTS. PERSONAL INJURY COULD RESULT FROM CONTACT WITH THIS SYSTEM.
DESCRIPTION
The coil pack consists of 2 coils molded together. The coil pack is mounted on the valve cover Ignition Coil Pack - 2.4L Engine
OPERATION
High tension leads route to each cylinder from the coil. The coil fires two spark plugs every power stroke. One plug is the cylinder under compression, the other cylinder fires on the exhaust stroke. Coil number one fires cylinders 1 and 4. Coil number two fires cylinders 2 and 3. The
PCM determines which of the coils to charge and fire at the correct time.
The Auto Shutdown (ASD) relay provides battery voltage to the ignition coil. The
PCM provides a ground contact (circuit) for energizing the coil. When the
PCM breaks the contact, the energy in the coil primary transfers to the secondary causing the spark. The
PCM will de-energize the ASD relay if it does not receive the crankshaft position sensor and camshaft position sensor inputs.
AUTOMATIC SHUTDOWN RELAY
DESCRIPTION
The ASD relay is located in the PDC Power Distribution Center (PDC) The inside top of the PDC cover has a label showing relay and fuse identification
OPERATION
The Automatic Shutdown (ASD) relay supplies battery voltage to the fuel injectors, generator field, electronic ignition coil and the heating elements in the oxygen sensors.
Refer to the Wiring Diagrams for circuit information.
The
PCM controls the ASD relay by switching the ground path for the solenoid side of the relay on and off. The
PCM turns the ground path off when the ignition switch is in the Off position unless the O2 Heater Monitor test is being run. Refer to the On-Board Diagnostics in the Emission Control section. When the ignition switch is in On or Start, the
PCM momentarily turns on the ASD relay. While the relay is on the
PCM monitors the crankshaft and camshaft position sensor signals to determine engine speed and ignition timing (coil dwell) If the
PCM does not receive crankshaft and camshaft position sensor signals when the ignition switch is in the Run position, it will de-energize the ASD relay
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