Hello JACUSTOMER, 99% of the time this is a bad ignition switch. This is a very common problem on this vehicle. The only other thing t o typically cause this is a bad body control module but the ignition switch is the most common.
You would rule out the Engine control module then? and do you thing the code reader dtc "link error" is related to the ignition switch issue or another problem?
I have looked at the Saturn service bulletin concerning the ignition cause of the starting problem but with the extra symptoms of Link Error and failure of the engine to start when directly applying power to the starter bypassing teh ignition switch I began to have doubts
Maybe the engine not starting when jumping the starter is normal too
Could the initial DTC P0604 Transmission Control Module have caused this too? Unfortunately my maintenance manual doessn't have a part named Transmission Control Module in the first place.
Do you have a test to verify the ignition switch is bad before replacing?
The ignition switch has been replaced; the new ig switch learning process followed; the Passlock light goes off approximately 5 seconds after the ignition is turned on as before. Lights on no crank. I've never had a PassLock flashing indication during a start failure.
Could the other symptoms be a factor?
Is there any way to troubleshoot the body control module?. I'm not convinced this is the root cause of the problem with the other symptoms.
Are there any ways to verify the body control module is bad before changing it? Changing the switch did not change anything. The Passlock was never the problem; isn't that something that should be present for the ignition switch?
Thanks, XXXXX XXXXX the diagram will allow quick analysis if there are any missing signals. If everything checks OK I will accept the fact my BCM is toast and "accept your answer." The clutch switch did check OK.