fully digital misread Help! September 14, 2009, 04:49:41 PM Hi guys i was wondering is there a way to read the real mileage on my 86 t bird the thing is it has a fully digital cluster and it shows 139000 km and when i switch to miles it shows 150000 approx what could be causing this error? Quote Selected
fully digital misread Help! Reply #1 – September 14, 2009, 06:14:57 PM well i do beleive the first digit will always be 1 on anything over 100,000 miles or km so basing the info you give me 150k miles is about 240k KM so your milage is accurate. 150k miles on the car or about 240k KM Quote Selected
fully digital misread Help! Reply #2 – September 15, 2009, 12:15:06 AM My 88 also has same problem reads 124,000km but reads 149,000Miles ?? Quote Selected
fully digital misread Help! Reply #3 – September 15, 2009, 12:38:20 AM the "1"00,000 mile digit stays as 1 once it has been reached as already stated. Quote Selected
fully digital misread Help! Reply #4 – September 15, 2009, 03:36:27 AM basically if you multiply the milage by 1.6 you will get the KM. on the full digital and base digital dash once it hits 100,000 miles.... the "1"00,000 digit remains a 1. as jcassity has said. so 100,000 miles is about 160000 Km 200,000 miles would appear as about 120,000 km when its actually 320,000 km. Quote Selected
fully digital misread Help! Reply #5 – September 15, 2009, 06:40:41 AM yeah i agree but could it be that 139000km is right and the defectuous number is in miles Quote Selected
fully digital misread Help! Reply #6 – September 15, 2009, 07:13:50 AM If your car really had 139,000km on it, it would show about 85,000 miles when you switched over to miles. Quote Selected
fully digital misread Help! Reply #7 – September 15, 2009, 10:15:10 AM thats the thing im tryin to figure all of you guys are supposing that the miles are the number thats right so like u said thunderchicken if i had 139 000 km it would show about 85000miles but if we said that i really had 150 000 miles i would have about 240 000km theres two scenarios possible Quote Selected
fully digital misread Help! Reply #8 – September 15, 2009, 10:41:12 AM Ohhh le sigh...Theres nothing wrong with your car. It has 150,000 miles on it. Quote Selected
fully digital misread Help! Reply #9 – September 15, 2009, 10:56:48 AM The guys are right. Your car has 240000 KM or 150000 miles I'll try to explain again what's going on here. The sixth digit on the odometer never changes once it reaches "1". If your car has 200000 plus KM it will display 1xxxxx KM. Same thing with miles. More than 200000 miles the OD will display 1xxxxx miles. The last 5 digits (miles and km) will display correctly. You can use this information and 1.6 km/mile to figure out the correct millage. I won't get into the math but I think someone here has figured out the possible senerios before. Quote Selected
fully digital misread Help! Reply #10 – September 16, 2009, 08:25:22 AM all you can do is assume it is working properly... is there something else that makes you think the milage went up on its own defectivly? and that your car is actually about 85k miles? i dont understand the big deal here. Quote Selected
fully digital misread Help! Reply #11 – September 16, 2009, 09:52:28 AM The car is a 1986 model. That's 23 years old, minimum, now, possibly 24. So, take the 150000, divide by 23, and you'll get about 6500. Is it possible the car has been driven 6500 miles per year? YES, it is. I have two 86's. I had to change the cluster out in my original one, and got to see first hand a rollover on the odo. The odo is only capable of counting up to 199,999.9. After that, it rolls to 100,000.0 and starts again. This is true for either the English units, or the Metric units. But, as stated, if you'll multiply the miles by 1.6, it should be close to the reading on the KM clock. So, for every 50,000 miles on the car, that's 80,000 km. If your miles is reporting 150,000, that would be 3 x 80,000, or 240,000 km. Like the others have tried to tell you, when the km got to 200000, it rolled back to 100000, and now would be displaying 140000, or there abouts. When the miles gets to 200000, it too will roll back to 100000 and start over. So, once one of these cars is past 200000, there's no way to tell how many miles are actually on them, i.e. 200K, 300K, 400K. You can probably figure it out with some trial and error math, though. Quote Selected
fully digital misread Help! Reply #12 – September 16, 2009, 10:30:13 AM You actually can figure it out, like you said, with trial and error math. If your odo is showing 150000 km, and the miles shows about 93000 your odo hasn't rolled yet. If it shows 155000 miles, that's really 250,000 km (the KM have rolled over, but the miles haven't yet). If it shows 117000 miles that means the miles AND km have rolled over (The KM have actally rolled over TWICE, and the car has 350,000 km on it). It's probably easier to start with miles, so make note of your KM reading, then press the E/M button. Multiply whatever miles are on the car by 1.6, and that should give you the KM. If the miles and KM don't jive (IGNORE THE FIRST DIGIT, you're looking for the second and subsequent digits), add 100,000 miles to your miles reading and do the math again.Example: Car shows ~150,000 km. Press the E/M button and it now shows ~117,000 miles.Multiply 117000 X 1.6 and you get ~187000. Ignoring the "1", the last five digits of your metric odo reading should be ~87,000. It isn't, of course - your metric reading shows 150000. Now you've got to try again.Add 100000 miles to your miles display reading. This gives you 217000. Multiply that by 1.6, and you get ~350000 km. Ignoring the 3, you'd have ~50000. This would match up with the 150000 km's your odometer shows, so your car actualy has ~350,000 km or 217,000 miles on it.Once both the miles and KM have passed 199999 this is the only way to verify the true mileage using your odometer. Quote Selected
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