Radio setting off alarm?

[RF5BPilot]

Last night, the alarm on my 2003 C2 996 with the factory Becker & Bose system started blaring. The car had been locked in the garage. It had been several days since it was last used. Using the remote, I unlocked the car, plugged in a trickle charger, locked the car & went back in the house. 10 minutes later, it started again.

Using a Durametric, I scanned the system & got: Current Fault Codes: 54. Radio receiver defective. Status - not present. Frequency counter - 3.

I turned on the radio, it worked.

The car has had a history of odd radio/amp symptoms. Both the radio & amp have been replaced. Any ideas of how to approach this?

(The car is still under factory CPO--which is often a hit or miss with smaller things.)

[Loren]

Not the answer I am sure you want to hear...

Fault code 54 -- Radio receiver defective

Possible cause of fault

- Alarm system control module faulty

Work instruction:

1. Replace alarm system control module.

I guess it is time to use the CPO.

[RF5BPilot]

Mo info...

I went to the dealership before I saw Loren's reply.

They said 54 was a generic code, nothing to do with the radio.

They used one of their analyzers to determine that the alarms had been triggered by the cockpit sensor. Yet, when tested, the sensor tested ok. So, they wondered if there was a rodent in the car or some bug flitting past the sensor. (I usually leave the car in the garage, locked with the windows up. Bugs unlikely; so are rodents -- but not impossible.)

The result was that they left the codes in the system and I took it home, waiting to see if it happened again. But they said their next effort would be to replace the sensor which was not covered by the CPO.

[sigh]

Will wait a bit and see what happens.

Thanks Loren. If it goes off again, it seems like the cockpit sensor is fairly easy to get to. But even they said the sensors just didn't seem to go bad. So, there was a bit of head scratching. The main logic module seems more likely.

[Loren]

I sent you a PM.