SOLVED! Just another cluster issue - RPM & MPG dead

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  • Torsen
    Noobie
    • Aug 2010
    • 7
    #1

    SOLVED! Just another cluster issue - RPM & MPG dead

    Well, the revcounter and MPG meter stopped working some time ago. I took the cluster out and checked batteries, reading 3 volts. I checked and resolder bad looking joints. Refitted and still not working. Then, I resetted service leds and now the INSPECTION light is flashing. Oh, it's an E30 318is. What sould I check next?

    Help much appreciatted.

    Thank you.
    Last edited by Torsen; 06-06-2011, 06:54 AM.
    Tags: None
    • Bimmerista
      R3V Elite
      • Nov 2005
      • 5425
      #2
      My car did the same thing and it turned out to be the batteries in the SI Board.

        Comment

        • Eecen
          E30 Fanatic
          • Jun 2010
          • 1235
          #3
          Checked your fuses?

            Comment

            • Torsen
              Noobie
              • Aug 2010
              • 7
              #4
              Yep, fuse #10 going strong, all other related stuff working. I think that the failure is in the cluster itself, but no clues on where to look for.

                Comment

                • Jean
                  Moderator
                  • Aug 2006
                  • 18228
                  #5
                  Next logical move would be to put another known good si board, just because batteries show 3 volts doesn't mean the board is necessarily good.
                  Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                  OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                    Comment

                    • boosted_E30
                      Advanced Member
                      • Dec 2010
                      • 173
                      #6
                      Check fuse #12

                        Comment

                        • Torsen
                          Noobie
                          • Aug 2010
                          • 7
                          #7
                          Originally posted by boosted_E30
                          Check fuse #12
                          Radio, OBC, speedo working OK, not that fuse I'm afraid.

                            Comment

                            • Eecen
                              E30 Fanatic
                              • Jun 2010
                              • 1235
                              #8
                              Fuse 21? When my tach/econo gauge went out that fixed it. The fuse didn't look blown, but it was.

                                Comment

                                • Torsen
                                  Noobie
                                  • Aug 2010
                                  • 7
                                  #9
                                  I've bought a secondhand (reputedly working) cluster and the failure is still there. Now:

                                  -I've kept my "old" coding plug. Could the problem lie there?

                                  -How can I test the connectors? As long as fuel cons is working ok in OBC II, I understand fuel rate signal is fine.

                                  Ideas?

                                  Thank you.

                                    Comment

                                    • AndrewBird
                                      The Mad Scientist
                                      • Oct 2003
                                      • 11892
                                      #10
                                      3V batteries should actually read ABOVE 3V if they are good (3.2-3.4 is about right). The fact that yours only read 3V probably means they are dead.

                                        Comment

                                        • Torsen
                                          Noobie
                                          • Aug 2010
                                          • 7
                                          #11
                                          SOLVED! I tried a mate's coding plug and everything works.

                                          Thank you for your help.

                                            Comment

                                            • aknickintyme
                                              Noobie
                                              • May 2011
                                              • 33
                                              #12
                                              my tach/econo just stopped working this evening :(
                                              im new to e30's ive only had mine for a week.
                                              what is a coding plug??
                                              Last edited by aknickintyme; 06-06-2011, 11:22 PM.

                                                Comment

                                                • TurboJake
                                                  No R3VLimiter
                                                  • Oct 2010
                                                  • 3780
                                                  #13
                                                  Originally posted by aknickintyme
                                                  my tach/econo just stopped working this evening :(
                                                  im new to e30's ive only had mine for a week.
                                                  what is a coding plug??


                                                  Coding plug is circled.
                                                  But, 99% of the time it's the SI board. especially if it just dies.

                                                  Hit your dash, that sometimes brings everything back


                                                  Leave Me Transaction Feedback

                                                    Comment

                                                    • Torsen
                                                      Noobie
                                                      • Aug 2010
                                                      • 7
                                                      #14
                                                      Originally posted by aknickintyme
                                                      my tach/econo just stopped working this evening :(
                                                      im new to e30's ive only had mine for a week.
                                                      what is a coding plug??
                                                      SI batteries use to fail in pre-86 cars. Joints can go wrong in any car, take the cluster out and tell us what you find :)

                                                        Comment

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