Hello again,
After a month of untroubled driving, a couple of minor gremlins and some error codes have been thrown up that I thought the combined brains trust will probably be able to interpret rather better than I can.
2004 Tdi 75 ; I realised on picking it up that the battery was tired, and it appears to have been the original one when I got it replaced with a large Bosch that resolved the weak cranking. I've been told anecdotally this can cause some false positive errors in various systems unless one clears the fault codes (which I haven't yet done).
Last night the climate control was set on a gentle 20 (with Econ engaged) on a 20 minute drive home. As the car was beginning to mist up I turned off Econ. The windows cleared ; however after a few minutes of town driving and getting onto the dual carriageway I realised that the car was getting hotter and hotter - basically the same as when my A6 climate is set on HI. I put Econ back on, and the temperature still continued to rise, even with the temp setting turned down to LO. This continued for the next few minutes until we got home (by this time with the windows open as we were reaching sauna point!). Today - climate completely back to normal. I've gathered from various threads this could have been a stuck / confused flap rather than anything to do with CCU. I do have an open circuit code on the coolant sensor (and the temp gauge has only worked the first time I drove it) which is the next scheduled DIY fix along with thermostat.
This afternoon, got into the car and the 'drivers door open' diagram remained on the screen, and the internal lights stayed on. Microswitch was my first thought, but then I remembered that now and again when I put the key in the ignition before starting the door locks trigger on and off a couple of times and various threads saying this was a symptom of a deteriorating CCU. This stayed the same until I got home when I put the ODB reader in and scanned the CCU.
Faults -
01616 (signal wire to internal monitor sporadic [I had to replace the doorframe switch a month ago as it had failed])
01562 right rear door no unlock (it does)
01366 crash signal sporadic open circuit
01403 glass break sensor rear sporadic open circuit
01560 passenger door sporadic does not unlock (now and again)
The CCU in question is an 8Z0 959433 AF.
I've just gone and unlocked the car again, and the drivers door open signal has gone while the internal lights go out as expected.
Any thoughts? It is more a ghost in the machine than something terminally inconvenient right now (could some of the above be legacy of the dud battery?), but opinions on whether getting a refurbed CCU or a second-hand AF would be a good idea in due course would be appreciated.
Many thanks.
After a month of untroubled driving, a couple of minor gremlins and some error codes have been thrown up that I thought the combined brains trust will probably be able to interpret rather better than I can.
2004 Tdi 75 ; I realised on picking it up that the battery was tired, and it appears to have been the original one when I got it replaced with a large Bosch that resolved the weak cranking. I've been told anecdotally this can cause some false positive errors in various systems unless one clears the fault codes (which I haven't yet done).
Last night the climate control was set on a gentle 20 (with Econ engaged) on a 20 minute drive home. As the car was beginning to mist up I turned off Econ. The windows cleared ; however after a few minutes of town driving and getting onto the dual carriageway I realised that the car was getting hotter and hotter - basically the same as when my A6 climate is set on HI. I put Econ back on, and the temperature still continued to rise, even with the temp setting turned down to LO. This continued for the next few minutes until we got home (by this time with the windows open as we were reaching sauna point!). Today - climate completely back to normal. I've gathered from various threads this could have been a stuck / confused flap rather than anything to do with CCU. I do have an open circuit code on the coolant sensor (and the temp gauge has only worked the first time I drove it) which is the next scheduled DIY fix along with thermostat.
This afternoon, got into the car and the 'drivers door open' diagram remained on the screen, and the internal lights stayed on. Microswitch was my first thought, but then I remembered that now and again when I put the key in the ignition before starting the door locks trigger on and off a couple of times and various threads saying this was a symptom of a deteriorating CCU. This stayed the same until I got home when I put the ODB reader in and scanned the CCU.
Faults -
01616 (signal wire to internal monitor sporadic [I had to replace the doorframe switch a month ago as it had failed])
01562 right rear door no unlock (it does)
01366 crash signal sporadic open circuit
01403 glass break sensor rear sporadic open circuit
01560 passenger door sporadic does not unlock (now and again)
The CCU in question is an 8Z0 959433 AF.
I've just gone and unlocked the car again, and the drivers door open signal has gone while the internal lights go out as expected.
Any thoughts? It is more a ghost in the machine than something terminally inconvenient right now (could some of the above be legacy of the dud battery?), but opinions on whether getting a refurbed CCU or a second-hand AF would be a good idea in due course would be appreciated.
Many thanks.