Limp Mode! Speed Sensor? Magnet?

[Musthang]

Originally Posted by Sergio

Make sure someone did not replace the magnet screw with a longer one, it should be 1/4-20 x 0.5" and torqued to 65 IN-LB.

It should not bottom out without pressing on the magnet.

If the cart passes the "push" test, You have a welded Solenoid.

Sergio,
I just replaced the magnet with a high speed and the new bolt that was provided which was also the same length as the old bolt. The magnet is tight and so is the bolt.
I didn’t even try the push test after I drove it. I will try it when I get home though.
I just replaced the solenoid not even a month ago thinking that was why I didn’t have a reverse. Come to find out my controller was fried. Now I have reverse but I only have 8mph which is a bummer!

[Sergio]

That is right, there was an issue with reverse being faster than forward.....

Did You ever get the reverse buzzer working to make sure the FNR is wired properly now?

[Musthang]

Originally Posted by Sergio

That is right, there was an issue with reverse being faster than forward.....

Did You ever get the reverse buzzer working to make sure the FNR is wired properly now?

Yes sir, the buzzer just had a wire unplugged. I plugged it back in and it beeps in reverse now as it should.
I swapped the 2 quick connect wires on the controller when I had more torque in reverse than I did in forward. But other than that everything is the way I got it.

[Sergio]

Just wanted to make sure the reverse buzzer was making noise when the cart was in Reverse, that indicates the Controller and FNR are wired properly.

Definitely push the cart with the Key Switch OFF, the cart should offer resistance and the reverse buzzer should start making noise after a couple of seconds of forced movement.

If that works, You need to check the Solenoid big posts to make sure when the key is OFF there is a couple of volts from one post to the other.

[nickdalzell1]

Another thing that can cause limp mode is 'undervoltage cutback' or 'throttle fault.'

These cars go into limp mode when the batteries are getting low.

They also do it if the MCOR under the floorboard is failing/failed.

Need the handheld otherwise we're only guessing.

[Sergio]

Originally Posted by nickdalzell1

Another thing that can cause limp mode is 'undervoltage cutback' or 'throttle fault.'

These cars go into limp mode when the batteries are getting low.

They also do it if the MCOR under the floorboard is failing/failed.

Need the handheld otherwise we're only guessing.

None of the above cause limp mode according to the manual.

[nickdalzell1]

Based on experience. There's a code called 'under voltage cutback' that will make it slow down and 'severe under voltage' that makes it even slower and eventually shuts down.

'throttle fault 1' will engage limp mode too.

[Musthang]

Originally Posted by Sergio

Just wanted to make sure the reverse buzzer was making noise when the cart was in Reverse, that indicates the Controller and FNR are wired properly.

Definitely push the cart with the Key Switch OFF, the cart should offer resistance and the reverse buzzer should start making noise after a couple of seconds of forced movement.

If that works, You need to check the Solenoid big posts to make sure when the key is OFF there is a couple of volts from one post to the other.

Just pushed the car and there is resistance and the buzzer beeps after a few seconds.
I tested the solenoid with the key off and there is ZERO volts between the two. Assuming that I checked it correctly? I attached a picture just to double check.

I don’t plan on keeping this car so I hate to invest in a scanner. I just wanna get it out of limp mode so I can sell it.

[Sergio]

There should be a resistor connected to those two posts, if someone replaced the resistor with a piece of wire it would cause limp mode.

Otherwise You need a new Solenoid and a new resistor if You don't have one.

[Musthang]

Originally Posted by Sergio

There should be a resistor connected to those two posts, if someone replaced the resistor with a piece of wire it would cause limp mode.

Otherwise You need a new Solenoid and a new resistor if You don't have one.

Is this the wire that they stuck in there to replace the resistor?