Volvo 240 - Odometer Gear Replacement & Mileage Correction
A not-so-quick video detailling a step-by-step process for replacing the odometer gear on a 1990 Volvo 240. This video does not cover how to remove or reinstall the instrument cluster, only how to disassemble it once out of the car.
Also shown is how to use a very simple Arduino setup to emulate the speed sensor on the rear axle, thus allowing one to both test the odometer repair and verify correct action, and also correct for any lost mileage whilst the odometer was broken.
Volvo Owner's Club Forum Thread:
https://www.volvoforums.org.uk/showth...
Arduino IDE Download:
https://www.arduino.cc/en/software
(I used version 1.8.19, so you'll need to scroll down on this page to get the exact same one used in this video).
Chapters:
00:00 Speedometer Removal
04:36 Galvonometer Disassembly
05:00 Odometer Gear Removal
07:40 Checking For Debris
09:18 Debris Removal
10:15 New Gear Lubrication
12:10 New Gear Installation
14:49 Galvonometer Reassembly
18:23 Soldering Test Wires
21:34 Test Setup Equipment
23:29 Arduino IDE & Code
28:20 Arduino Connections
30:04 First Power On & Troubleshooting
31:22 Jumping Metal Connectors