mcapinha
Active Member
2.5 DSE here.
My battery has been getting weaker, so I decided to check my alternator output. Following a troubleshooting guide I found online, there are the readings I got:
- Voltage at battery after main beams on for 2 minutes: 12.37V (guide says that less than 12.40V the battery is shot);
- Voltage at alternator (measured to alternator body or to the engine block) at idle: 14.1V
- Voltage at battery, at idle, 14.0V;
- Voltage at cigarete lighter, at idle, 14.0V;
- Voltage at cigarete lighter, at 2000rpm, 14.0V (shouldn't this be higher ?);
- Voltage at cigarete lighter, at 2000rpm with headlights on: 13.9V;
- Voltage at cigarete lighter, at 2000rpm with main beams: 13.85V.
Also, Nanocom reads voltage as 13.60V on the BECM and 13.55V on the EAS module![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
My question is, since these seem to be borderline values, should I get my alternator checked ? I don't want to put on a new battery to find it dying on me just after 3 years, as it's happening to the one I got right now.
Also, what's happening with the Nanocom readings ? I get 14.0V inside the car, reading in the cigarete lighter, but the Nanocom reports a much lower (too low to me) voltage at the BECM and EAS ?
Cheers,
Manuel
My battery has been getting weaker, so I decided to check my alternator output. Following a troubleshooting guide I found online, there are the readings I got:
- Voltage at battery after main beams on for 2 minutes: 12.37V (guide says that less than 12.40V the battery is shot);
- Voltage at alternator (measured to alternator body or to the engine block) at idle: 14.1V
- Voltage at battery, at idle, 14.0V;
- Voltage at cigarete lighter, at idle, 14.0V;
- Voltage at cigarete lighter, at 2000rpm, 14.0V (shouldn't this be higher ?);
- Voltage at cigarete lighter, at 2000rpm with headlights on: 13.9V;
- Voltage at cigarete lighter, at 2000rpm with main beams: 13.85V.
Also, Nanocom reads voltage as 13.60V on the BECM and 13.55V on the EAS module
My question is, since these seem to be borderline values, should I get my alternator checked ? I don't want to put on a new battery to find it dying on me just after 3 years, as it's happening to the one I got right now.
Also, what's happening with the Nanocom readings ? I get 14.0V inside the car, reading in the cigarete lighter, but the Nanocom reports a much lower (too low to me) voltage at the BECM and EAS ?
Cheers,
Manuel