Axis Dyno Moto VX-12, Руководство пользователя, Страница: 46 / 48

RPM Troubleshooting Guide
1.
First check to make sure that RPM is the only reading not present. If other readings are
also not present then a bigger issue is likely present causing the loss of RPM. If only
RPM is not present, continue on to step 2.
2.
Check that the ground cable is connected between the electronics box and the vehicle.
In order to read RPM, the box needs a common ground with the vehicle. Once
connected check again for RPM. box as well as the USB which provides the 5V power.
Wait 30 seconds then reconnect the USB and DC power, order is not important. Check
again for RPM.
3.
If the injector harness used has two connectors to mate with the RPM harness, try
4.
Power cycle the entire system by unplugging both the DC power to the electronics
swapping them. One of the connectors will have the injector signal while the other will
have a steady ~12V. Applying the 12V to the RPM input will not damage anything;
however you will not have an RPM reading with this configuration. After swapping check
again for RPM.
5.
Check for continuity in the injector harness as well as the RPM harness with a
multimeter.
a.
If no continuity is present, narrow it down to which harness has the open circuit
and contact Dobeck Performance for a replacement.
b.
If both harnesses have continuity, move on to the next step.
6.
Disassemble electronics box to expose the internals. Depending on the generation of
box in question the procedure to accomplish this will vary.
7.
Make sure that the white/yellow wire is going into the terminal labeled FIO4 on the
labjack.
a.
If the wire is going into wrong terminal, swap wires to match the picture below.
Check for RPM.
8.
Measure the resistance between FIO4 and VS on the labjack. There should be ~1k
between the two.
a.
If resistance reading varies beyond 10 ohms, contact Dobeck Performance.
9.
With vehicle hooked up and running, probe the yellow wire inside the electronics box.
Work the throttle to increase RPM’s and look for a corresponding decrease in voltage on
the yellow line.
a.
Repeat previous step on while probing the white/yellow wire. If decrease in
voltage with rising RPM is seen only on the yellow wire, then the RPM smoothing
box is bad; contact Dobeck Performance for replacement.
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