N-CVT warning light diagnosis

[phil-s]

Hi,

I've got a 1999 1.0 Micra automatic, it's been suffering momentary loss of drive for a couple of years, a local garage has been unable to diagnose the problem so I've been living with the quirk. However, I was recently driving on the motorway when the N-CVT warning light came on, my speed was then restricted to 30-40 mph and trying to accelerate resulted in juddering.

Googling the issue i found the N-CVT diagnosis procedure described in this thread: NCVT Problem. The result of this was "Fault Code No Number - Lamp blinks at 4Hz repeatedly - Battery supply fault or memory back-up fault"

Has anyone here experienced this or got any idea of how to bring my car back to full health?

Thanks

Phil

 

[micra 2000]

i would check the brushes and to check do the following:

1. Remove the battery
2. Remove the holding plate that is underneath the battery (you have to un-attach it from the fuse/relay boxes first)
3. Next to the N-CVT dipstick is the electrical connector for the brushes. Disconnect this.
4. This electrical connector was plugged in to the brush holder, unbolt this panel. There are two bolts, top and bottom.
5. CAREFULLY remove this brush holder.
6. Check the brushes, they should not be worn down to the mark.

the clutch on the n-cvt is known as a powder clutch when you press the accelerator pedal a micro switch is pressed
and power is sent to the brushes which in turn magnetizes the powder which give you drive and vice versa
if the brushes are worn to the line or you cant see the line then this maybe why you have lost and then gained drive as the powder is turn from a magnetized state back to a powder state.

i believe that Delco alternator brushes are very similar and can be used in place of the originals i am sure an auto spark would fit them into the brush holder for you for a small charge

 

[Japie]

Hi Phil.
Just wondered if this worked ?