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  • D4D charging voltage

    Can anyone tell me what voltage they get across the battery terminals when the engine is running. I am only getting about 13.5 volts which I think is on the low side. My 100 series cruiser used to get up to 14.5 volts.
    Cheers

    Robbo

    2007 D4D GXL, ARB bar, 9000lb warn winch, Koni suspension, poly-airs, roof rack, cargo barrier, cargo drawers, compressor, dual battery system etc

  • #2
    i dont have the d4d but when engine is idling i get 14.2 volts
    had an 03 gx 120 with some gear now got a 2013 bt 50 GT auto some ARB gear.

    Comment


    • #3
      Originally posted by samo
      i dont have the d4d but when engine is idling i get 14.2 volts
      Thanks Samo,

      I thought it was a bit low
      Cheers

      Robbo

      2007 D4D GXL, ARB bar, 9000lb warn winch, Koni suspension, poly-airs, roof rack, cargo barrier, cargo drawers, compressor, dual battery system etc

      Comment


      • #4
        take ya beloved back to toymota and see what they can do. cheers samo
        had an 03 gx 120 with some gear now got a 2013 bt 50 GT auto some ARB gear.

        Comment


        • #5
          Ahhhhhhhhhhhhhhhhhhhhh...what an interesting subject
          I have been investigating this for a little bit, you may have seen an earlier thread where I sought some comparisons
          The output voltage on the D4D alternator is governed
          Mine will do 13.5 - 13.94v when motor is cold, but if it is warmed up I cant ever get better than 13.4 and most of the time 13.2. The reason for my investigations has been because my 2 battery isolator relays trip at 13.4, so it causes me some angst if I stop for a half hour, the relays wont kick across because of insufficient voltage
          Tojo have had a good look at my alternator and they are adamant that it is within spec :roll: I ask what "spec" is they say...just like that there (my Prado)
          The issue is upsetting some people around the place with Prado's and "lux's, there is a trail of stuffed batteries starting to form

          I'll be doing some more talking in the next week or so gathering info from industry experts, my view is that goverining back the alternator is a real good way to kill batteries and Tojo should/could and maybe will take responsibility for changing tried and true industry specs to suit themselves...watch this space

          Comment


          • #6
            Maybe the battery is fully charged? Which in turn will command the regulator/alternator to not pump out as many volts as a battery that needs charging?

            Have you tried it with lights on, etc?

            Comment


            • #7
              Originally posted by Team Piggy
              Maybe the battery is fully charged? Which in turn will command the regulator/alternator to not pump out as many volts as a battery that needs charging?

              Have you tried it with lights on, etc?
              Yeah done a lot of fiddling TP, including running all lights, high beam, spotties, winch etc, the thing is designed to throttle back alledgedly to protect the electronics

              Comment


              • #8
                Very interesting!! I will be keen to hear what you come up with. Thanks for your help.





                Originally posted by xvprado
                Ahhhhhhhhhhhhhhhhhhhhh...what an interesting subject
                I have been investigating this for a little bit, you may have seen an earlier thread where I sought some comparisons
                The output voltage on the D4D alternator is governed
                Mine will do 13.5 - 13.94v when motor is cold, but if it is warmed up I cant ever get better than 13.4 and most of the time 13.2. The reason for my investigations has been because my 2 battery isolator relays trip at 13.4, so it causes me some angst if I stop for a half hour, the relays wont kick across because of insufficient voltage
                Tojo have had a good look at my alternator and they are adamant that it is within spec :roll: I ask what "spec" is they say...just like that there (my Prado)
                The issue is upsetting some people around the place with Prado's and "lux's, there is a trail of stuffed batteries starting to form

                I'll be doing some more talking in the next week or so gathering info from industry experts, my view is that goverining back the alternator is a real good way to kill batteries and Tojo should/could and maybe will take responsibility for changing tried and true industry specs to suit themselves...watch this space
                Cheers

                Robbo

                2007 D4D GXL, ARB bar, 9000lb warn winch, Koni suspension, poly-airs, roof rack, cargo barrier, cargo drawers, compressor, dual battery system etc

                Comment


                • #9
                  Not sure if the alternator itself is governed, but I know the alternator is is controlled by the ECU.
                  Below is the update from Redarc battery isolators where they actually had to drop the rating so it could work with these new alternators.


                  Hope this helps.
                  cheers
                  Les
                  LES
                  [url=http://www.brisbane4wdclub.org/index1.htm]Brisbane 4Wd Club Inc[/url]
                  [url=http://www.brisbane4wdclub.org/images/avatars/mystuff.htm]MY STUFF[/url]

                  Comment


                  • #10
                    Yep,

                    This is true, I had the Redarc in my 100 Series replace for this exact reason early last year. Had the new one removed from the 100 Series and installed in the Prado and have had no problems, at idle my TD sits at around 13.85.
                    [color=#0040FF]Rob[/color]
                    [color=#0040BF]2012 Altitude D4D &
                    04 Jayco Eagle Outback[/color]

                    Comment


                    • #11
                      D4D battery charging

                      I took mine to an auto elec today. He said its the lowest voltage he has seen on a modern car. We isolated all accessories etc and still only got 13.5 volts. He then rang the service guys at toyota who said the charging voltage should be 14.2 to 14.5 volts and suggested I should bring it in. The service guy also said that they had a Prado in today with the same problem. Hmmmm interesting! Mine is booked in for next week. I will let you know what transpires.
                      Cheers
                      Andrew




                      Originally posted by xvprado
                      Ahhhhhhhhhhhhhhhhhhhhh...what an interesting subject
                      I have been investigating this for a little bit, you may have seen an earlier thread where I sought some comparisons
                      The output voltage on the D4D alternator is governed
                      Mine will do 13.5 - 13.94v when motor is cold, but if it is warmed up I cant ever get better than 13.4 and most of the time 13.2. The reason for my investigations has been because my 2 battery isolator relays trip at 13.4, so it causes me some angst if I stop for a half hour, the relays wont kick across because of insufficient voltage
                      Tojo have had a good look at my alternator and they are adamant that it is within spec :roll: I ask what "spec" is they say...just like that there (my Prado)
                      The issue is upsetting some people around the place with Prado's and "lux's, there is a trail of stuffed batteries starting to form

                      I'll be doing some more talking in the next week or so gathering info from industry experts, my view is that goverining back the alternator is a real good way to kill batteries and Tojo should/could and maybe will take responsibility for changing tried and true industry specs to suit themselves...watch this space
                      Cheers

                      Robbo

                      2007 D4D GXL, ARB bar, 9000lb warn winch, Koni suspension, poly-airs, roof rack, cargo barrier, cargo drawers, compressor, dual battery system etc

                      Comment


                      • #12
                        Boys,
                        Any update on this issue, how did you go with Toyota.

                        Peter

                        Comment


                        • #13
                          Update

                          Hi Peter,
                          I was supposed to take mine last week but had to postpone. It is booked in next Thursday. I will post the result.

                          Cheers Andrew





                          Originally posted by PAL001
                          Boys,
                          Any update on this issue, how did you go with Toyota.

                          Peter
                          Cheers

                          Robbo

                          2007 D4D GXL, ARB bar, 9000lb warn winch, Koni suspension, poly-airs, roof rack, cargo barrier, cargo drawers, compressor, dual battery system etc

                          Comment


                          • #14
                            Well Chaps,

                            Had it back to the dealer today. They said that it is charging to about 13.6 and that is ok. He also said that all the latest cars charge to about that range. I am not convinced and have not finished. I have other avenues to pursue.

                            Stay tuned
                            Cheers

                            Robbo

                            2007 D4D GXL, ARB bar, 9000lb warn winch, Koni suspension, poly-airs, roof rack, cargo barrier, cargo drawers, compressor, dual battery system etc

                            Comment


                            • #15
                              I have heard the same in a thread or two here on PP (but I can't find it back again ops: ) ... that the new setups don't charge at the same rate .. and that Redarc has changed the settings in their isolators to kick in earlier.

                              Punters installing the older Redarcs into their new trucks were finding that the isolator didn't kick in and start charging the aux battery.

                              Cheers
                              Chippy

                              Comment

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