Tie Wrap all the wiring that you need to or that was previously Tie Wrapped. Replace everything (make sure you plug back in your Gong that connects under the Driver’s side kick panel), clean up and plug back in the car’s battery (if you previously unplugged it for the air bag removal). Turn on your car and your new OBC will light up in two sections; the OBC INFORMATION side and the CLOCK/DATE side. If one side is darker than the other then check and replace the bulbs. You can use the bulbs from your old 7 or 11 Button MID/OBC since they are the same size. If your Temp reading is stuck on -35 F and the F is flashing, it usually would mean that the temperature sensor is not working, but I found out that it was just the wiring on the Black Connector was loose, (I.E the Black Connector was loose and not all the way in on the OBC.) Just turn off the car and unplug and re-plug both Connectors. If your sensor is fine, TEMP should now work along with everything else.
CHECK Light. As soon as you start your car, if you didn’t connect your new 18 Button OBC to a Check Control Module, then the CHECK light will momentarily display on your Odometer for a few minutes before going out. This is good, because it lets you know your wiring going to the Odometer is working and your OBC is functioning as it should. Your OBC may also give off a chime to let you know that Check Control is not connected.
Fuel Consumption & Range features may need to be calibrated as my numbers were way off during the first week or until I filled up my gas tank. The Range was super low and Consumption was between 6 and 9 MPG. When I refilled the gas tank my Range went up as it should, but because Consumption data is the Rate that affects the Range data the Range went down really quickly after fill up. I’m not sure if I have to manually calibrate the Consumption data, but my Consumption data has improved on its own over the week of driving to 10 to 12 MPG which is still not even close to my normal 20 to 30 MPG consumption. I’m still reading up on it to see if t will automatically adjust or if I have to calibrate it. There are a few websites that show the secret codes for unlocking, calibrating, resetting and testing all the data and computations on the 18 Button OBC. Also the Speed feature is not your current instantaneous speed (that is what your Speedometer needle is for) it is your average speed for all the driving you do until you reset it back to 0.
Everything else on your new 18 Button OBC should be common sense or can be easily Googled. Even I'm still trying to figure out all the secret Calibration and Test Data stuff. I will add more info to this DIY later on as I progress with the ZKE IV CODE Feature hook up. Like I said, I have an aftermakrket alarm in my car and none of the other previous DIY say whether that affects what wire you need to hook into whether it be the wires on your Aftermarket Alarm or the infamous Black/Green wire.
Also I will try to find out if I already have a Check Control Module in my car, or if I don't I will see if I can connect one (if it is not too hard) and make the CHECK features work. So look out for those additions coming in the near or far future.
Until then, enjoy your new OBC!