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Let me first ask, Does the check engine light come on everytime you cut the key on? How often does this problem happen? 1/2 the time you attempt to start it? once every 10 times? I want to make sure the ECM is powering up everytime you cut the key on.
Lite comes on everytime. It happens every time (no Start) I leave key on a few minutes and it starts.definate ignition problem as I have a timing lite as I try to start. The security light is now out sinse I put on a new key and tumbler in. Prior to that lite stayed on and I had no starter.
Try relearning the key 1st here is the procedure.
The Passkey II system has the Theft Deterrent Module (TDM) function stored in the Body Control Module (BCM). The TDM portion of the BCM will validate the resistive chip in the ignition key. If resistance value read by the BCM is what the BCM is expecting, the BCM will send a message over serial data to the PCM informing the PCM that a valid key is present and the PCM may start the vehicle.
To perform a relearn on a Passkey II system, make sure there is a fully charged battery in the vehicle. The battery will be used for 30 minutes without the alternator available for charging. Connect a battery charger to the battery to ensure power is available while programming. Both the BCM and PCM must be working and communicating with each other.GM Vehicle Theft Deterrent (VTD) Relearn
1.Insert ignition key and turn to the “ON” position. Do not attempt to start the engine. Leave the key in the “ON” position for approximately 11 minutes. The security light will be steady on or flashing for the 11-minute period. Do not proceed to Step 2 until the security light turns off or stops flashing.2. Turn the ignition switch to the “OFF” position for 30 seconds.3. Turn the ignition switch to the “ON” position as in Step 1 for 11 minutes.4. Turn the ignition switch to the “OFF” position for 30 seconds.5. Turn the ignition switch to the “ON” position as in Step 1 for 11 minutes for a third time.6. Turn the ignition switch to the “OFF” position for 30 seconds for a third time.7. Turn the ignition switch to the “ON” position for 30 seconds.8. Turn the ignition switch to the “OFF” position.9. Attempt to start the engine.If the engine starts and runs, the relearn is complete.
Not available to try right now. Will get back later. Thanks.
I am sorry ,This is my sons car, I said the engine light comes on, it does not. More up date on past info (I wasn't aware of till now) Starter and battery were changed, then this no start occured. I tried 11 min .30 sec. thing. No help, actually tried twice. Some times it will run ok. Yesterday it ran ok, today engine rotates,no start. no timing light on while rotating.
last question not answered yet.
cranks good, no tick or knock security lite off.Car ran good friday. Sat no start. Sec. lite off. Sun. no start, sec.lite off. no ignition with timing lite, tried several wires.Sec.lite off in a few seconds.No engine lite sat. or today.
Also tried key on ,key off procedure again today. Battery charger on to main
no reply since sunday at 2:41.
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Will try a new CPS later today and get back to you. Thanks
Today I changed cam &crank sensors,and ignitional module. Couple days ago I replaced key and tumbler at dealer. Ran the 11 min key on 30 sec.key off that was suggested. As it stands now security light off in a couple sec. I DONOT ever have a engine lite, key on motor not running or running. Sometime car starts ? when won't run I have no fire,check for fire with timing lite and tried several wires
No spark right now, possible may start up later. If it starts I can shut it off and on several times ok if done imediately. Than perhaps after several on/off times it won't start. The security lite go off ok.
car runs good once started, have help wiggling wires as trying to start, no luck there.
Just finished changing ignition switch. Did not help.
After all your suggestion and my idea did not, I junked the car. Changed key tumbler, ignition switch, ignition module, crank sensor, can sensor, traced all wiring, had pcm checked. What else ? I junked the car. WILL NEVER buy a general motor car again!!!!!!!!!!!!!!!!