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| Thread ID: 140620 | 2015-11-13 01:52:00 | Incorrect speedo reading | tims (10184) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1411335 | 2015-11-13 01:52:00 | I've got a 1.3 diesel Suzuki Swift and compared the speedo accuracy with my satnav speed display (which I know is accurate) and found the Swift's speedo is showing the speed 6 to 7 km/hr faster than I'm actually going. No big deal really (might even save me a ticket or two!), but when I have to pay RUC it gradually adds up as I'm assuming the distance traveled is wrong as well (more km than I'm actually travelling). If I'm right, is it possible to get the speedo fixed - anybody know if a service center can easily fix this problem? Thanks |
tims (10184) | ||
| 1411336 | 2015-11-13 02:30:00 | I would see a specialist speedo service if you really want it calibrated (places like Auckland Speedo Services and Robinson Instruments may be able to help or point you in the right direction). Bear in mind that tyre tread, pressure etc, can contribute some way towards speedo accuracy. The accuracy is likely to be out by a % rather than a km value, so if it is out by 6-7km/h at '50' is obviously far worse than if it is out by 6-7kmh at '100'. Most auto manufacturers will calibrate the speedo to read slightly high, I suspect predominantly to avoid them being liable for speeding infringements in a case where a speedo reads low. In most countries they are legally allowed to read high by a given % - under ADR 18/03 (and I suspect NZ is likely the same or very similar), the speedometer must never display a speed lower than the vehicles true speed, and must be accurate to within +/- 10% + 4km/h, so at a 'true speed' of 100kmh, it is allowed to read up to 114kmh. Again, that is the Australian design rules, I can't find anything specific for NZ but I imagine approximately the same guideline is likely. | inphinity (7274) | ||
| 1411337 | 2015-11-13 05:14:00 | OK, thanks. I spoke to a mechanic at a Suzuki dealership and he basically said the same as you but he suspected that although the speedo was reading high he thought the odometer would be correct. Next time I go out I'll compare the odometer with the trip function (distance traveled) on my satnav and see if the two match. |
tims (10184) | ||
| 1411338 | 2015-11-13 05:47:00 | seen it with a different brand, speedo was 9km/h out but odometer was spot on. | tweak'e (69) | ||
| 1411339 | 2015-11-13 06:12:00 | Our Suzuki Balano petrol says its doing 50 yet the roadside speed sign says 45. Our newish Nissan Navara diesel is bang on with the sign. Don't have an in car GPS but am aiming to test them both against my hand held one. |
gary67 (56) | ||
| 1411340 | 2015-11-13 06:27:00 | My Swift is about 4km/h out as well, my mate's Chery is 10km/h out much to our amusement :D My old Baleno was bang on. |
pcuser42 (130) | ||
| 1411341 | 2015-11-13 18:37:00 | Husbands old ute was always out. He didn't care. Son changed mags on his car with original wheels and now his speedo reports he is going about 5kph faster than he actually is. Probably a good thing - avoid speeding tickets. Can be the wheels too, not just speedo. |
pctek (84) | ||
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