89TC-16V Posted June 12, 2012 Share Posted June 12, 2012 I have a cluster that the odometer and speedo are both out. Would it be the speedo sensor or the cluster? The tach is working Link to comment Share on other sites More sharing options...
89TC-16V Posted June 15, 2012 Author Share Posted June 15, 2012 anybody? before i take the cluster out and try another to see if it works, i think thats easier than changing the sensor 1st and still not knowing if its the cluster or not Link to comment Share on other sites More sharing options...
Guest Jim_McNally Posted June 15, 2012 Share Posted June 15, 2012 Spedo is driven by the sensor - if the connector or wiring is loose, the needle will jump around a lot. If the speedo needle is dead, it could be the connector, wiring (I had rabbits chew up the wire to the sensor in my 8V - no really...) or the sensor. Sensor is fairly cheap - might be worth trying out if the wiring all looks good.Jim Link to comment Share on other sites More sharing options...
89TC-16V Posted June 16, 2012 Author Share Posted June 16, 2012 sensor is actually different on the 16V than the 8valve. i have an extra, its just not the easiest place to reach. Link to comment Share on other sites More sharing options...
Guest Jim_McNally Posted June 16, 2012 Share Posted June 16, 2012 Yup - it's on the trans. Easier if you remove the air-filter box and some of the hoses first...Jim Link to comment Share on other sites More sharing options...
89TC-16V Posted June 18, 2012 Author Share Posted June 18, 2012 I tried swapping the sensor, no change. I changed the cluster also, no change. Not sure whats the culprit Link to comment Share on other sites More sharing options...
Guest Jim_McNally Posted June 18, 2012 Share Posted June 18, 2012 My guess would be a break in the wires from the sensor to the cluster - that's all that's left...Jim Link to comment Share on other sites More sharing options...
89TC-16V Posted June 18, 2012 Author Share Posted June 18, 2012 theres no fuses right anyplace ? Link to comment Share on other sites More sharing options...
89TC-16V Posted June 19, 2012 Author Share Posted June 19, 2012 well i swapped in 3 clusters and 2 sensors and have no response. guessing to check the wiring next Link to comment Share on other sites More sharing options...
Guest Jim_McNally Posted June 19, 2012 Share Posted June 19, 2012 I just looked at the wiring diagram, and it shows two connectors - the oval one on the sensor, plus a square one (labeled "Rear of Battery") and then the wires go to the SMEC. So I'd check that square connector, and then try the SMEC connector - it's pin 48 on the big connector. Maybe try swapping the SMEC if you have a spare.Jim Link to comment Share on other sites More sharing options...
89TC-16V Posted June 19, 2012 Author Share Posted June 19, 2012 i have a spare smec also. i really dont need it to work today, but at least its a place to start thanks Link to comment Share on other sites More sharing options...
Guest My TC Toy Posted June 22, 2012 Share Posted June 22, 2012 I have been thinking about your problem and now that you replaced all those parts for a second time, did you physically examine the plastic drive gear in the gear box. If I am not mistaken, I know it is the cas for other connections, when you remove the sensor the plastic drive gear stays in the case, and you would normally not see it. Now if this plastic gear has stripped out against the metal drive gear on the gear box shaft, the sensor will never send a signal to the speedo head. What you should try now is to remove the speed sensor, then remove the plastic gearing piece and examine both the plastic gear and the metal shaft gear. Hopefully I am correct in this assumption and you will find your problem.Good Luck.Bob Link to comment Share on other sites More sharing options...
89TC-16V Posted June 22, 2012 Author Share Posted June 22, 2012 when you purchase a new one, i dont even know if it comes with a new gear? i removed the one on the trans in my backyard thats loose out of car and theres no way to grab the gear out not sure what id have to use to remove it if possible, on the A568 in my daytona the gear came out easily. i should have a gear thats good if i knew how to remove it Link to comment Share on other sites More sharing options...
Guest My TC Toy Posted June 23, 2012 Share Posted June 23, 2012 Sorry, I cannot advise you how to remove the plastic gear. I would think that it lifts out. It is always possible that the gear, if damaged, is jammed in place. Maybe someone else can help! I hope this looks after your problem.Bob Link to comment Share on other sites More sharing options...
89TC-16V Posted June 23, 2012 Author Share Posted June 23, 2012 i started to look yesterday, it looks like the part of the trans that the gear rides in comes off the trans,jut have to figure out how when i get home, it looks like its easily enough, but i dont know how im gonna do it with the one thats in the car Link to comment Share on other sites More sharing options...
Guest My TC Toy Posted June 23, 2012 Share Posted June 23, 2012 I don't know what you concern is (HA-HA), it was easy enough when the factory assembled it. I bet if you check a shop time manual, it would probably alloy 0.3 hours to replace it. OH, The joys!!!!Good luck. Bob Link to comment Share on other sites More sharing options...
89TC-16V Posted June 23, 2012 Author Share Posted June 23, 2012 concern more is that the bobble strut bracket and bobble are in the way and the item that seems to come out is a square and havent seen if it turns or what yet for removal. probly more like an 1hr easily for removal and replacement. the shop manual is almost useless on the 16V trans, best is it says if broken remove and replace, only adjustments that can be made on the trans are to the shifter cables. personally speedo and odo arent all the rage these days, long as i have oil, temp, voltage and tach i can more than drive well, the rest is a plus Link to comment Share on other sites More sharing options...
TheLanesinNY Posted June 23, 2012 Share Posted June 23, 2012 You can run a quick test by spinning the distance sensor with an electric drill or old record player motor (harness connected with the key on) to see if the odometer and or the speedometer move. The sensor is just a simple reed switch and magnet. If it works like this than the gear in the trans-axle has a problem. I think the gear is suppose to stay clipped to the sensor. It might pop up if you can spin the half shaft on that side of the transaxle in the correct direction with the sensor missing. When i have serviced those it was from under the car by feel since it is a long reach from the top.-Rich Link to comment Share on other sites More sharing options...
89TC-16V Posted June 23, 2012 Author Share Posted June 23, 2012 gear wouldnt even come out when i tried to fish it out, and this was on a trans that i knew the speedometer functioned. the sensor new doesnt show it coming with the gear either new Link to comment Share on other sites More sharing options...
TheLanesinNY Posted June 30, 2012 Share Posted June 30, 2012 OK looked at my spare 16V get rag, there is a lower bolt & clamp that mounts the gear/bearing assembly much like the auto trans versions do. Two more quick checks, does the cruse work, assuming it did before the speedometer stopped? Since it uses the distance pulses fed to the computer.Do you have access to the DRB 2 or a SnapOn diagnostic tool? They can let you know if the computer is seeing speed sensor pulses.I suppose in a pinch you could take a voltage reading at the cluster, as long as the distance sensor line is changing even at slow speed than it is probably functioning. Sorry, i don't recall which side the battery voltage comes from.-Rich Link to comment Share on other sites More sharing options...
89TC-16V Posted July 1, 2012 Author Share Posted July 1, 2012 havent tried the cruise and i dont have access to a scanner Link to comment Share on other sites More sharing options...
Apollothesun Posted March 25, 2013 Share Posted March 25, 2013 havent tried the cruise and i dont have access to a scannerany luck in finding the answer? i have the same situation.thanksapollo Link to comment Share on other sites More sharing options...
89TC-16V Posted March 26, 2013 Author Share Posted March 26, 2013 nope am living without as i dont drive it much at all Link to comment Share on other sites More sharing options...
Guest Sue Bell Posted July 25, 2013 Share Posted July 25, 2013 Okay guys, I have owned my 1989 TC for several years now, and the speedomoter and odometer have never worked. The key is to never drive faster then the car in front of you and check your GPS if you need the mileage. Fortunately, all the more important gauges work. I could see that my car was running very hot long before the head blew lol. All better now tho....... Link to comment Share on other sites More sharing options...
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