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Classic Saab 9-5 (MY 1998-2010) / Re: Key gets stuck in ignition - electrical grief
« on: Today at 09:20:45 AM »
If the car recognises the remotes are programmed. I would suspect that the fault lies in the radio communication. If neither key remote works, I would start looking at the receiver unit at the back of the centre console, and the circuitry from there to the central locking.
The fact that the key operated all four doors in the past, but now doesn’t suggest that your mechanic changed something unnecessarily. Can you get access to a Tech2 Saab/GM computer? That will remotely operate electrical items one at a time, as well as find error codes that are Saab specific and not detectable with a universal ELM code reader.
Does the central locking switch by the gear selector work. If so, the locking system is probably OK and the fault is with the remote radio side. If it does not work, the fault lies with locking system. It may be a problem in the TWICE unit under the front seat. That controls all the locking logic. If it’s faulty, a new unit won’t work without a matching key transponder and a Tech2 session.
The door open warning could be a faulty door switch. It’s just a switch to Earth, so a broken wire could cause that.
The fact that the key operated all four doors in the past, but now doesn’t suggest that your mechanic changed something unnecessarily. Can you get access to a Tech2 Saab/GM computer? That will remotely operate electrical items one at a time, as well as find error codes that are Saab specific and not detectable with a universal ELM code reader.
Does the central locking switch by the gear selector work. If so, the locking system is probably OK and the fault is with the remote radio side. If it does not work, the fault lies with locking system. It may be a problem in the TWICE unit under the front seat. That controls all the locking logic. If it’s faulty, a new unit won’t work without a matching key transponder and a Tech2 session.
The door open warning could be a faulty door switch. It’s just a switch to Earth, so a broken wire could cause that.