The Ground wiring at the Engine bay, came from Factory as Follows:
► From the Battery's Negative Terminal, to a 8 mm Bolt on the inner fender side, goes a 6 Ga Wire.
► Around twenty inches from said bolt, there is another 8 mm Bolt, Hiding under the Relay & Fusible Box, where is attached the main ground wire for the Engine & transmission; it is another 6 Ga Wire, that goes to another 8 mm Bolt on the transmission, right under the Air Filter Box, next to the TSS.
► There is another ground wire, but much thinner, at the other side, nearby the alternator, it is a 10 Ga wire that goes from a Bolt on the intake Manifold, to a Bolt on he other fender's inner side.
Long time ago, I had placed another Ground Wire, directly from the Battery's Negative terminal, to the Engine's Head, but this time I decided to get rid of that, in favor of a much better grounding setup. Let me Explain:
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Kia Sephia Sporty
Posted 23 June 2014 - 03:31 PM
The Ground wiring at the Engine bay, came from Factory as Follows:
Posted 23 June 2014 - 03:32 PM
► First: I removed all the Bolts, which were Rusty, and thrown them away, replacing them with brand new inox steel reinforced Bolts.
► Second: Using a Sanding Sponge...
...I cleansed all the Contact Surfaces where those Bolts should be: at the Transmission, the one Next to the Battery at the inner fender side, and the one Hiding under the Relay & Fusible Box.
► Third: I Cleansed all the terminals from all the original ground Wires, using same sanding Sponge.
► Fourth: I obtained a Brand New Ground Wire, this one is Thicker: 4 Ga which comes pre-made with open "eye" terminals at both ends:
► Fifth: I Placed all the Ground Wires as they came from factory, as I described above.
► Sixth: I added the new ground wire, Directly from the Battery's Negative Terminal, to the Transmission's Bolt, together with the Factory one, in order to "Reinforce" the Ground on the Transmission & Engine.
► Seventh: After Tighten all the shiny, brand new Bolts, I Smeared them with Clear Silicone for High temps, also smeared their surroundings, in order to weatherproof the contacts.
(Clear Silicone is easy to remove, it comes out almost as one piece, using a knife, in case is needed)
Posted 23 June 2014 - 03:33 PM
At the Transmission's Grounding Bolt:
At the Battery Terminal, notice the two wires:
one is Factory, the other is the one I added.
Posted 23 June 2014 - 03:35 PM
After the Grounding Wires Cleansing & Adding the New one, I drove the "KiaStein" all the past Weekend; at first, the Tachometer's failure disappeared, but suddenly the failure reappeared again, this time the Tachometer's needle drops dead to zero readings for way less time; and comes back to life, reading normally again, Randomly.
The problem is less, but still exists.
So, I believe that the Culprit of this fail could be located inside the cabin. I'll check the internal wirings and the instrument cluster itself, as soon as Possible, and report back here the results.
Edited by Loyale 2.7 Turbo, 01 July 2014 - 10:41 PM.
Posted 23 June 2014 - 09:53 PM
You're very welcome! I hope the print outs help you out.
In looking at the diagrams, see if you can determine where the ECU and tachometer/gauge cluster are grounded. Once you find that you can use a multi-meter to check the resistance between those points and the negative terminal of the battery and check the resistance of the ground wiring.
Posted 01 July 2014 - 10:53 PM
You're very welcome! I hope the print outs help you out...
Thank You, yes they are really Helpful, in many other areas,
not only the ones related to the Wiring.
Posted 01 July 2014 - 10:55 PM
I Fixed completely the Tachometer's failure since a week ago, but I decided to Not post here the cause / repair, until I am Completely Sure that the issue will not reappear; my Wife has been Drivin' the "KiaStein" without problems since then, and she reports that the Tachometer's failure has completely Gone.
I was Right when I wrote that the Failure was Caused by an Electrical False Contact:
... I believe that the issue could be caused by Electrical False contact on the wirings related to the Tachometer.
"Electrical False Contact" = Means when a Fuse or Bridge wire is proven to be good / alright (Passing current from one of its sides to the other) but its ends / terminals are loose and \ or have enough corrosion to don't let the current to flow as it should, flowing intermittently or not flowing at all.
Posted 01 July 2014 - 10:58 PM
After I checked all the Exterior Wiring (at the Engine Bay),
I started to Check the Interior Wiring (at the Cabin) and everything was alright.
So, I decided to Remove the instrument Cluster and check it Carefully...
Posted 01 July 2014 - 11:01 PM
And I Found the Culprit!
The thin plastic that has the electrical tracks, behind the instrument cluster, sends the Power, Ground and info for the Tachometer, also to the Speedometer and the rest of the Gauges, via long Screws, that touches those tracks and sends the signal to the gauges' system.
Those contacting screws were Loose, very loose...
...those loose contacting screws made the Electrical False Contact.
Posted 01 July 2014 - 11:02 PM
I only needed to clean their contacting surfaces and place them there, very Tight.
Voilá! ... Problem: Solved.
Posted 02 July 2014 - 12:51 AM
Back on the "Timing Belt Service" topic,
I finished to obtain all the needed parts;
as you can see in this Photo:
Posted 02 July 2014 - 12:52 AM
This is the List of Parts on the Photo, for the Timin' Belt Service on the "KiaStein":
► Part Nº: 24312 2Y000 = Timing Belt.
► Part Nº: 24450 2Y000 = Tensioner.
► Part Nº: 24810 2X700 = Idler.
► Part Nº: 0K013 10602 = Camshaft Seals. (Two Needed)
► Part Nº: 0B3C7 10602B = Crankshaft Seal.
The only part that I have not obtained, is this:
► Part Nº: 21310 2Y011 = Oil Pump.
Posted 06 July 2014 - 02:12 AM
I Agree with you, the Tachometer has been working absolutely Flawlessly since then.
Posted 06 July 2014 - 02:13 AM
I've not done the Timing Belt service on the "KiaStein" yet, mainly due to the Lack of enough time, I've been Super Busy nowadays... but also, somehow I was still debating with myself, if I should obtain a New Oil Pump or Not; especially after readin' this Thread:
~► Sephia oil pressure light
it was indeed the oil pump. the two little tabs that hold hold onto the crank wore away and it was pushing oil up to the cylinders but not enough to get the lifters.
Posted 06 July 2014 - 02:17 AM
Despite that my Wife's "KiaStein" doesn't run with its original 2000 Sephia T8D engine, it has a much newer T8D engine from a 2003 Spectra; I am concerned about a possible Oil Pump Failure...
Posted 06 July 2014 - 02:27 AM
However... I have not enough money to buy a Brand New oil pump yet... and something happened today: The car developed a new, strange whining noise after its first startup this morning; I opened the engine bay and after a brief visual inspection, I encounter this:
The Upper Cover for the Timing Belt has Cracked, and the piece of Plastic that fell inside, was rubbing against the cover and the Timin' Belt ... ...
Posted 06 July 2014 - 02:36 AM
So, I had to Remove the Upper Cover for the Timin' belt, to let it "Clean" itself by Centrifugal action, and it Worked well...
The Noise went away as the plastic flew away... the Timin' belt has one minor / superficial scratch of two millimeter long on its back, but otherwise looks pretty Healthy, for a Belt which is almost reaching the 100K Miles old... and supposed to be changed earlier.
Posted 08 July 2014 - 02:59 PM
Yeah I'm not sure about the oil pump. It may be of a different design than Subarus....and might need to be replaced.
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