Atuca
Supporting Member
- 1,140
- 292
- Jan 6, 2007
-
Central Valley,
California
Hey guys, another question on the ever so popular Saturn Alternator swap.
I have wired the saturn alternator in my 2g DSM as follows:
DSM plug DSM wire use Saturn plug
------------ ---------------- ---------------
Red 12v Constant Source - Connected from switched 12v source to F wire
Black/Yellow Metering of Voltage - L wire
Green Pin 41 on the ECU Voltage Regulator FR - Unused
White Pin 33 on the ECU Voltage Regulator G - Unused
Well I recently received a check engine light today:
P1500 Generator FR terminal Circuit malfunction
Funny I should receive that code, because I cut that wire! The FR wire is not used in the saturn alternator swap, even if I used the 3 wire CS plug and tied it into a distribution block (which I do plan on doing for those who care to know).
I would have thought this issue would have been more widespread since this is a very popular mod, but searches on tuners and dsmlink came up with nothing. I heard from the mod snowboarder that there may have been a ECMlink update that allowed this issue to be ignored by the ecu, but if this is untrue, how did you guys solve this issue?
Aside from the check engine light, alternator works great
Thanks for any and all help.
And....... done:
ECMTuning User Support Forums
It appears you just need to ground the wire. I still will need to test this theory to confirm, but it appears to be correct if its from dmertz.
For those who are curious, the other pins, Green Pin 41 and White Pin 33 go to the ECU and are grounded there when you turn on headlights to prevent the interior lights from getting brighter. Not sure how that works in practice, but now I know in theory.
I blame dial up for my creating of this thread... But at least if someone searches tuners for "check engine light" and "saturn alternator swap", this pops up for them now
I have wired the saturn alternator in my 2g DSM as follows:
DSM plug DSM wire use Saturn plug
------------ ---------------- ---------------
Red 12v Constant Source - Connected from switched 12v source to F wire
Black/Yellow Metering of Voltage - L wire
Green Pin 41 on the ECU Voltage Regulator FR - Unused
White Pin 33 on the ECU Voltage Regulator G - Unused
Well I recently received a check engine light today:
P1500 Generator FR terminal Circuit malfunction
Funny I should receive that code, because I cut that wire! The FR wire is not used in the saturn alternator swap, even if I used the 3 wire CS plug and tied it into a distribution block (which I do plan on doing for those who care to know).
I would have thought this issue would have been more widespread since this is a very popular mod, but searches on tuners and dsmlink came up with nothing. I heard from the mod snowboarder that there may have been a ECMlink update that allowed this issue to be ignored by the ecu, but if this is untrue, how did you guys solve this issue?
Aside from the check engine light, alternator works great
Thanks for any and all help.
And....... done:
ECMTuning User Support Forums
Originally Posted by dsmraver
Has anyone seen a DTC from this swap on a 2g? I'm getting a "DTC 1500 Generator FR terminal circuit malfunction" on my car when I try to start it.
I got that code as well. If you search, I believe dmertz posted that you can ground one of the unused wires to get rid of that DTC. My car threw it, but it didn't effect anything.
It appears you just need to ground the wire. I still will need to test this theory to confirm, but it appears to be correct if its from dmertz.
For those who are curious, the other pins, Green Pin 41 and White Pin 33 go to the ECU and are grounded there when you turn on headlights to prevent the interior lights from getting brighter. Not sure how that works in practice, but now I know in theory.
I blame dial up for my creating of this thread... But at least if someone searches tuners for "check engine light" and "saturn alternator swap", this pops up for them now
Last edited: