Where is speed sensor in FJR 2007 ???

[qbis0]

I have problem witch my odometer. SOmethink was broken because odometer don't indicate the travel speed.

Engine speed indicator in RPM work correctly.

Anybody know where is the speed sensor situated in FJR model after 2006.???

 

[Fred W]

There isn't one, technically (see note below) in 2nd gens. With the inclusion of ABS as standard equipment in 2nd gens, the speedometer/odometer are driven from a signal that originates with the rear wheel ABS sensor. Here are the troubleshooting notes from the FSM:

Repair or replace if there is an open or short circuit.
• Between rear wheel sensor and ABS ECU coupler.
(white–white)
(black–black)
• Between ABS ECU coupler and ECU coupler.
(white/yellow–white/yellow)
• Between ECU coupler and meter assembly.
(yellow/blue–yellow/blue)
I don't think the problem could be with the wheel sensor or before the ABS ECU or else you would have an ABS fault.

Note: There is a road speed sensor on YCCS (AE models) only, that is in the engine/ transmission case rear on the left side. It appears to be just above the U joint output shaft from the diagrams in the FSM. But this sensor appears to only be used by the YCCS system. The speedometer / odometer should still be driven by the rear wheel sensor.

 

[Geezer]

Can you be more specific about exactly what the problem is? If I read your post correctly your tachometer (engine RPM) is correct but your speedometer(road speed)/odometer(mileage traveled) are not. Or is that the speedometer itself is OK, but the odometer is inaccurate?

What year FJR do you have? The early ones, we generally refer to them as Gen1, which includes US model years 2003 through 2005, have a speedometer which can display in either MPH or KPH. The user's manual will tell you how to switch between the two by using the buttons on the speedometer.

 

[qbis0]

Can you be more specific about exactly what the problem is? If I read your post correctly your tachometer (engine RPM) is correct but your speedometer(road speed)/odometer(mileage traveled) are not. Or is that the speedometer itself is OK, but the odometer is inaccurate?
What year FJR do you have? The early ones, we generally refer to them as Gen1, which includes US model years 2003 through 2005, have a speedometer which can display in either MPH or KPH. The user's manual will tell you how to switch between the two by using the buttons on the speedometer.

I have 2008 FJR to clear my problem is that speedometer (roadspeed) not works. Engine RPM works correctly, temperature, etc all works, except speed hint.

When I switch the key to on two hints (rpm, speed) go to max and go back to 0. But after if I will start drive speed hint is still in 0. Where should I search defect?????

 

[Fred W]

See my post above.

If you are not getting any ABS faults (which I assume is true since you do not mention any) than either the ABS ECU is not sending the road speed signal to the Main ECU or the Main ECU is not sending the signal to the instrument cluster. Since the speedometer needle sweeps when you power on you can tell that the instrument itself is not defective.

Anyone know if the power on self test originates in the instrument cluster or in the Main ECU? That might help narrow it down.

 

[Geezer]

[I have 2008 FJR to clear my problem is that speedometer (roadspeed) not works. Engine RPM works correctly, temperature, etc all works, except speed hint.

When I switch the key to on two hints (rpm, speed) go to max and go back to 0. But after if I will start drive speed hint is still in 0. Where should I search defect?????

Uh, yeah, I guess I did see that you had an '06 in your original post. My mistake.

Anyway, I was hoping this was something simple but it doesn't look that way.

 

[FJRONAMISSION]

I have problem witch my odometer. SOmethink was broken because odometer don't indicate the travel speed.Engine speed indicator in RPM work correctly.

Anybody know where is the speed sensor situated in FJR model after 2006.???

=====

Mine is located near my sphincter modulator .....

..... YMMV.......... :blink:

B

.. it is Friday ........right?? :lol: :lol: B)

 

[Constant Mesh]

Speedo, odo, trip meters all not working?

If any of them are working then the problem is likely in the meter assembly. We know the odo reading is stored in the meter assembly and not the ECU.

The road speed (pulse rate) is sent from the ECU to the meter assembly. The meter assembly generates MPH and the various odo readings (miles or KMs) from the ECU signal.

So if the trip meters are working the problem is in the meter assembly.

 

[qbis0]

Speedo, odo, trip meters all not working?
If any of them are working then the problem is likely in the meter assembly. We know the odo reading is stored in the meter assembly and not the ECU.

The road speed (pulse rate) is sent from the ECU to the meter assembly. The meter assembly generates MPH and the various odo readings (miles or KMs) from the ECU signal.

So if the trip meters are working the problem is in the meter assembly.

So if it's not meter assy what's wrong????????

 

[qbis0]

speed, ODO, trip also not working. Only RPM works.

Regarding ABS indicator when I starting the engine the ABS indicator lighting on 2sek. after go out.

How to check the signal from rear whel sensor to ABS unit, after ABS->ECU and after from ECU to ODOMETER???

IS there some electric schema??

Thanks for any help.

 

[Fred W]

I would look closely at the yellow / blue wire that runs from the Main ECU up to the Instrument cluster. Check it with an ohm meter end to end. Look under the tank it will pass through a rectangular 12-pin connector (3 pins x 4 pins). My guess would be that this connector is corroded and you are losing you speed signal there.

The other wire that runs from the ABS ECU to the Main ECU (text says white/yellow but my diagram shows white/black) also passes through an intermediate connector somewhere near the ABS ECU. So you'd just want to check the same way (end to end at the two ECUs).

Good luck

 

[Checkswrecks]

I would look closely at the yellow / blue wire that runs from the Main ECU up to the Instrument cluster. Check it with an ohm meter end to end. Look under the tank it will pass through a rectangular 12-pin connector (3 pins x 4 pins). My guess would be that this connector is corroded and you are losing you speed signal there.
The other wire that runs from the ABS ECU to the Main ECU (text says white/yellow but my diagram shows white/black) also passes through an intermediate connector somewhere near the ABS ECU. So you'd just want to check the same way (end to end at the two ECUs).

Good luck

Start with what Fred wrote here. Take my post as an educated guess until something more factual comes along, but...

As mentioned, it sounds like the signal from the wheel to the ABS is good. The meter assembly is likely good, because the needle sweeps on start. Not a sure thing, but the sweep is usually a power test of the meter itself and has nothing to do with the ECU or circuit coming in. The ground circuit external to the meter assembly appears intact. That leaves what Fred wrote.

I'd start simple, removing the tank and enough fairings to follow the wires from the meter assembly to the ECU. Look real close for chafed wires and then for corrosion inside each of the connectors. I'm going to guess you find your problem by this point. If not, you could use a ohmmeter to check the wires between the plugs and give each of the wires a LIGHT tug at the connectors to see if one is loose. If still no luck, I think you need to get the ECU memory checked.

Good Luck and let us know what you find.

 

[qbis0]

I checked the connections, and I wanted to measure resistanec on the ABS sensors but it was impossible because my meter shows nothing (for rear and front ABS sensors).

One more think I try to ride on the moto and I checked if ABS works correctly. I was driving about 60-80 km'h and I pres the rear brake very hard the whell was blocked... so ABS don't work correctly.

Probably hat's the problem that speedometer doesn't work because ABS is broken.

I checked fuses and all fuses are ok.

Only when I start the engine ABS indicator light on 2-3sek. After that ABS indicator switch off.

How can I diagnoze ABS system or mesure resistance of the ABS sensors.

Thanks for any help in advance.

 

[Constant Mesh]

The resistance of the sensor coil measured at the coupler terminals should be 1.2 to 1.6 Kohms.

The serial port connection between the ECU and meter assembly is probably OK since the the RPM and coolant temperature displays are working properly.

Not sure that the ABS ECU must be working correctly for the speedo to work correctly. I suspect that the rear wheel speed sensor signal just passes through the ABS ECU and isn't manipulated by the ABS ECU.

The problem is likely the rear wheel ABS sensor or its associated wiring. It's just a coil of wire wrapped around a permanent magnet.

 

[qbis0]

I've checked ABS sensors both of them have 1,33 kOhm so it's ok.

Tomorrow I will try to check resistance on the wires as Fred wrote. I will make some photos and I will put it in the post.

Color of the wires from ABS sensors is Black and white.

Also Under the seet cover between ABS control unit and ABS pump there are two relay,

it's possiblity to check relay if it's ok???

 

[qbis0]

Today mornig I visited Yamaha dealer.

During driving of course my speedometer doesn't worked but engine also show error number 42.

According servive manual it's "bad signal from rear whell".

Anyway I have to wait for the answer of the dealer, we will see.....