Ask a Car Mechanic and Get Answers to Your Car Questions ASAP
If the security lamp is flashing once per second while the key is on this indicates a fault
I am looking over the code charts for 41 and 42 and I need to know the If you can take a look at the coil setup on the vehicle and tell me how it has six plug wires configured on the coils.
Do you have type l or type ll coil pack design.
There are some issues I will cover on the code 41 and 42, but first we need to look at the security system.
When you place the ignition key in the run position what is the security lamp on the instrument cluster doing?
It is also important for me to know if your security lamp is coming on and then going out in about 2 seconds...or is it remaining on or flashing with key on.
If the security PASSKEY System has disabled the Fuel and Starter, that is where we need to focus our energy.
GENERAL DESCRIPTION The Personal Automotive Security System (PASS-Key II) is standard vehicle equipment. The system prevents vehicle theft by disabling the engine unless a key with a specific electrical resistance is used in the steering column ignition switch. The system components are the ignition key, the steering column lock cylinder, the PASS-Key II Decoder module, the starter enable relay, and the power control module (PCM).
SYSTEM OPERATION The PASS-Key II system prevents the engine from starting if the proper resistance is not sensed from the ignition key. Only one of the 15 resistance values available works with each PASS-Key II module.The PASS-Key II module controls the starter enable relay and the PCM fuel enable input. If the PASS-Key II module does not send the proper pulse width modulated (PWM) signal to the PCM fuel enable input, the PCM does not allow fuel to be provided to the engine.If the wrong resistance value is sensed when the ignition is turned on, the PASS-Key II module does not ground the starter enable circuit and does not output the fuel enable PWM signal for approximately three minutes. This prevents the engine from starting and discourages the thief from trying key codes (resistance values) at random.If the correct resistance is sensed when the ignition is turned on, the PASS-Key II module grounds the starter enable circuit and outputs the fuel enable PWM signal. This allows the engine to start normally.
That's exactly what I was thinking we could get to on yours.
Those tiny wires that go from the Ignition Lock Cylinder down through the column on those actually break and it sounds like you have one that is close or it is broken and the bang on the column caused then to touch and make contact.
Make sure the ignition keys are in good shape and the little brass pellet isn't worn down to nothing. Replace the lock cylinder...it comes with the wires that go down through to a connector at the base of the steering column.
If you get replacement keys, be sure the pellet resistance is the same that is on the original key. There are 15 or so resistance codes for the keys.
A Locksmith or Dealer should be able to provide the correct key.
Let's get that part handled, and see if the 41 and 42 still come up after the PASSKEY system is repaired.
I'll be honest with you, I have never disabled that system.
I've done the repairs.
I know there is a failsafe operation if it fails while you are driving as long as the correct key was last used to start. I'll do some checking today at work to see what we can do about that for you.
Thanks for your patience.
OKCustomerit seems that the best method for bypassing the PassKey system is to
measure the resistance that is in your Good Ignition Key with a quality Mutli-meter, and go to Radio Shack and purchase a 1/4 Watt Resistor of the exact same value as the one in your Key.
Then simply go to the base of the column where the small lock cylinder wires come out to a connector, and unplug the connector and leave it unplugged and plug in the resistor you got from Radio Shack.
The resistor will then trick the PassKey Module into thinking there is always a key in the ignition even when there is not.
Before you do this, plug the key into the lock cylinder and at the connector check to see that your wiring is actually open to the lock cylinder. If the wires are broken you will have no continuity when checked.
Those who I talked to, say that is the best of methods if you don't want to install a new lock cylinder.
CIRCUIT DESCRIPTION: During cranking, the ignition module monitors the dual crank sensor sync signal. The sync signal is used to determine the correct cylinder pair to spark first. After the sync signal has been processed by the ignition module it sends a fuel control reference pulse to the PCM. When the PCM receives this pulse it will command all six injectors to open for a (priming) shot of fuel in all cylinders. After the priming, the injectors are left "OFF" for the next six fuel control reference pulses (two crankshaft revolutions) from the ignition module. This allows each cylinder a chance to use the fuel from the (priming) shot. During this waiting period, a cam pulse will have been received by the PCM. Now the PCM begins to operate the injectors sequentially, based on true camshaft position. However, if the cam signal is not present at start-up a code 41 will be set and the PCM will start sequential fuel delivery in any old random pattern. The engine has a 1 in 6 chance that fuel delivery is correct. Code 41 sets when the following condition exists:
Numbers below refer to circled numbers on the diagnostic chart.
DIAGNOSTIC AIDS: An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation. Check For:
CIRCUIT DESCRIPTION: The ignition module sends a reference and a fuel control reference signal to the PCM when the engine is cranking. For the first two fuel control pulses, the ignition module controls ignition timing. Then the PCM sends a 5 volt signal on the bypass CKT 424 to switch timing to PCM control. An open or ground in the EST or bypass circuit at the time the engine is started, will set a code 42. The engine may be started but will run on module mode ignition timing. Code 42 sets when the following conditions exist:
DIAGNOSTIC AIDS: An intermittent may be caused by a poor connection, rubbed through wire insulation, or a wire broken inside the insulation. Check For:
I hope that this additional info is what you needed.
Please keep in mind that we are paid nothing for the service we provide unless you click "ACCEPT"