Wiring diagram and ideas to resurrect dead Porsche 997.1

[Wookie]

? thanks Plugs, incidentally I said ‘PASM’ above when I meant ‘Transponder Module’
Cheers,

 

[plugsandsparks]

Had a quick look and there is only one common component and its the CAN gateway. However its possible that a number of controllers are also poorly. The Battery / gen one should be an easy fix.

e.g. Battery voltage is picked up by engine ECU, then its is transmitted over Can "Drive" to the Gateway which then sends the message over to Can "Instrument" which is then read by the instrument cluster. So for this to work you need: Working Alternator, ECU, Gateway and Instrument Cluster.

The Front controller that does the headlights and Fans amongst other things is on a different Can; Can "Comfort" this relies on messages from the engine ECU on Can "Drive" to know when to come on, e.g. when engine is hot etc.

Unless these CAN messages are getting through normal service will not be resumed.

 

[plugsandsparks]

Porsche Diagnostic Packages :: Gendan Automotive Products

A link to Durametric Enthusiast cable and software, you can order it direct from Durametric for $287 but after paying for shipping and import tax probably cheaper using gendan.

This is the tool that allows access to all CAN Buses and through to each controller, from there you can see which ones work and which ones dont.

 

[Wookie]

Had a quick look and there is only one common component and its the CAN gateway. However its possible that a number of controllers are also poorly. The Battery / gen one should be an easy fix.

e.g. Battery voltage is picked up by engine ECU, then its is transmitted over Can "Drive" to the Gateway which then sends the message over to Can "Instrument" which is then read by the instrument cluster. So for this to work you need: Working Alternator, ECU, Gateway and Instrument Cluster.

The Front controller that does the headlights and Fans amongst other things is on a different Can; Can "Comfort" this relies on messages from the engine ECU on Can "Drive" to know when to come on, e.g. when engine is hot etc.

Unless these CAN messages are getting through normal service will not be resumed.

Thanks for this, it all makes sense! A recent development in the quest is that I’ve found a local indy who has a PIWIS and who is happy to come round to my place and run a diagnostic. Possibly this week, TBA. I will keep you posted and thanks again for your interest and help.
Cheers,
Matt

 

[Wookie]

Thanks for this, it all makes sense! A recent development in the quest is that I’ve found a local indy who has a PIWIS and who is happy to come round to my place and run a diagnostic. Possibly this week, TBA. I will keep you posted and thanks again for your interest and help.
Cheers,
Matt

Thanks for this, it all makes sense! A recent development in the quest is that I’ve found a local indy who has a PIWIS and who is happy to come round to my place and run a diagnostic. Possibly this week, TBA. I will keep you posted and thanks again for your interest and help.
Cheers,
Matt

Thanks again to all responders for the help and support.

I just wanted to post a final report on this project to get the 997 back into action. As previously mentioned it was “woken up” by replacing a set of components, the ECU, Transponder, Steering lock and Keys and a Gateway controller all coded to the VIN and I think there is another security code needed but I’m not clear on this, the whole set with coded done was supplied by a guy in Slovenia. With the car running but with almost all electronics malfunctioning or not functioning I found a local guy with a PIWIS 2, the porsche diagnostic and coding tool. There then followed several sessions of diagnosis and coding, we found the body control module had failed and I replaced it with used part. The diagnosis, fault code clearance etc was an iterative process, we also included a PIWIS dealer reset, it helped to have got a list of all options included in the specific car from porsche so that when coding we could make sure not to activate non-present options. If you do this the gateway looks for the non-present option and reports it as an error.

After several PIWIS sessions and the new/used BCM all systems are now go!

The only remaining issue is a puzzle.

If you start the car and check the dash display of error messages you get a “battery/generator” fault and when you check with a multimeter if the battery is charging you find it is not. However if you simply switch off and then restart the car within about 8 seconds the battery/generator message does not reappear and you find the battery is charging. If you leave it more than about 8 seconds to restart the fault remains etc.

I have not worked on this issue yet as it was not too much of an inconvenience to just do a quick restart and so I had good use of the car over the summer.

Thanks again everyone.

Best wishes, Matt

 

[DPG]

Thanks again to all responders for the help and support.

I just wanted to post a final report on this project to get the 997 back into action. As previously mentioned it was “woken up” by replacing a set of components, the ECU, Transponder, Steering lock and Keys and a Gateway controller all coded to the VIN and I think there is another security code needed but I’m not clear on this, the whole set with coded done was supplied by a guy in Slovenia. With the car running but with almost all electronics malfunctioning or not functioning I found a local guy with a PIWIS 2, the porsche diagnostic and coding tool. There then followed several sessions of diagnosis and coding, we found the body control module had failed and I replaced it with used part. The diagnosis, fault code clearance etc was an iterative process, we also included a PIWIS dealer reset, it helped to have got a list of all options included in the specific car from porsche so that when coding we could make sure not to activate non-present options. If you do this the gateway looks for the non-present option and reports it as an error.

After several PIWIS sessions and the new/used BCM all systems are now go!

The only remaining issue is a puzzle.

If you start the car and check the dash display of error messages you get a “battery/generator” fault and when you check with a multimeter if the battery is charging you find it is not. However if you simply switch off and then restart the car within about 8 seconds the battery/generator message does not reappear and you find the battery is charging. If you leave it more than about 8 seconds to restart the fault remains etc.

I have not worked on this issue yet as it was not too much of an inconvenience to just do a quick restart and so I had good use of the car over the summer.

Thanks again everyone.

Best wishes, Matt

Thanks for the update, glad you're getting things sorted. What a nightmare though. The lesson being if you get a fault like this, get rid of the car straight away!