Hi all,
I have been searching through the forum and read what I could find on the subject - but I just can't find any good leads on how to fix the issue. I recently bought a cheap 2009 Bravo 1.9 Mjet to have as an all round daily driver. It came with battery warning light and no power steering. Before purchase it got a new alternator and I have put in a new 77Ah battery. Last owner was told that the problem might be in the BCM.
I have done several checks but has not been able to solve the issue and I have not been able to determine if the problem is with the BCM or the power steering unit. These are the symptoms :
- No power steering
- Battery charge light constant
- Main earth chassis/engine replaced and cleaned
- Alternator puts out 14,4v on idle
- Error code B1020 Alternator D+ signal
- No red power steering warning light
I have measured voltage on D+ from alternator and it's 13,8v. Is this enough for the BCM to register alternator charging ? Should it be equal as the charge voltage 14.4 ?? The D+ wire is measured and complete from alternator and in to BCM connector. I have also measured 14,4v on power steering connector with engine running and 12.6v with engine off.
Last owner disconnected all connectors on BCM and found that the PS was then working but not much else. Is this to be understood as it's a BCM fault ? I am at a loss here and can't seem to get any further. We have no trained Fiat garages in my area so a garage fix will be a two hour drive so that will be the last option eventually.
Many thanks,
Arvid
I have been searching through the forum and read what I could find on the subject - but I just can't find any good leads on how to fix the issue. I recently bought a cheap 2009 Bravo 1.9 Mjet to have as an all round daily driver. It came with battery warning light and no power steering. Before purchase it got a new alternator and I have put in a new 77Ah battery. Last owner was told that the problem might be in the BCM.
I have done several checks but has not been able to solve the issue and I have not been able to determine if the problem is with the BCM or the power steering unit. These are the symptoms :
- No power steering
- Battery charge light constant
- Main earth chassis/engine replaced and cleaned
- Alternator puts out 14,4v on idle
- Error code B1020 Alternator D+ signal
- No red power steering warning light
I have measured voltage on D+ from alternator and it's 13,8v. Is this enough for the BCM to register alternator charging ? Should it be equal as the charge voltage 14.4 ?? The D+ wire is measured and complete from alternator and in to BCM connector. I have also measured 14,4v on power steering connector with engine running and 12.6v with engine off.
Last owner disconnected all connectors on BCM and found that the PS was then working but not much else. Is this to be understood as it's a BCM fault ? I am at a loss here and can't seem to get any further. We have no trained Fiat garages in my area so a garage fix will be a two hour drive so that will be the last option eventually.
Many thanks,
Arvid