Hi,

I hope everybody is doing well.

I have a problem with my CR-V. I can deal better with mechanical stuff than electrical so I hope to find help.

The fuel gauge is working erratically, the needle moves when it feels like it seems.

I did some testing.

In the service manual (see pictures) it is mentioned that the voltage between pin 2 and 5 of the connector should be between 5 and 8 V.

I measure 12.5 V ( the battery voltage is 12.5 V ).

Would you know why the voltage is supposed to be between 5 and 8 V?

It is mentionned to check for an open in the YEL/BLK (instrument panel gauge assembly) or BLK (ground).

If there was an open, shouldn't it be supposed to be 0 V?

The no.25 7.5 A fuse is ok.

I tested the low fuel indicator and this one is ok.

The fuel pump is working.

Thank you!

 

Don't know why it says between 5 and 8 volts with the 5 pin connector disconnected?
With the connector off, it should measure 12 volts because there is no current draw.
The open circuit is due to the connector being off.
With the connector attached, it should measure between 5 and 8 volts.
That would measuring across the fuel sender.
The resulting voltage should depend upon how much fuel is in the tank.
When shorting pins 2 and 5 together, it should move the fuel gauge towards full mark.
Be careful, it doesn't take much time for the gauge to be damage if pins 2 and 5 are shorted.
Shorting is just to make the gauge move.

If the fuel gauge moves a lot then it can be due to the float moving with the level of the fuel in the tank.
Waves are created for almost every motion. A physical dampener on the float can even out the reading on the gauge.
But, don't know of any for the CRV.

Electronically can be done but that can also cause all sorts of other issues.
If it bothers you then perhaps changing the fuel gauge would help.
The coil inside the gauge is meant to retard the motion of the dial.

 

Thank you for your reply.

I went back to the car after reading your answer and I realized that I made a mistake: I was measuring on the wrong side, connection/plug side instead of wire side so I was not measuring pin 2 and 5. I should have read with more attention, I finally saw it is written under the connector picture.

Everything seems to work, The sending unit might fail eventually, I will know what to check.

Sorry for the trouble, I will make sure I check everything next time.

Good day!

 

No worries. We have all been in a place where we just was not looking at it correctly.
It is part of being human.
Glad it all works out.