Vectrix acceleration and throttle problem.

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wovenrovings
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Vectrix acceleration and throttle problem.

Post by wovenrovings » Thu, 17 Oct 2019, 17:31

My Vectrix has a problem and I am not sure where I should start looking. Hoping someone can give me some pointers.

So what is happening is sometimes it will fail to accelerate. I can get to maybe 50km/h. At the same time the low voltage light associated with the bms flashes or rather flickers in time with the motor sound. Kind of like the motor is turning on and off very fast. This bike has leaf cells and Goodrum/Fletcher BMS. The previous owner had some battery connections come loose but I don't thick it is this because seems like it can be fixed by stopping and turning it off and on again. It has a cycleanalyst and when this is happening there is no drop in voltage.

Another this that happened occasionally in winter, qld so maybe 5-10 C, is in the first 1km there the throttle response would reverse. By this I mean I would be accelerating and suddenly acceleration would become regen and vise versa. Stop and turning off and on again would fix it. Haven't had any problem since the weather warmed up. Looking on the internet I wasn't able to find anyone else with these symptoms.

Any suggestions appreciated.

antiscab
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Re: Vectrix acceleration and throttle problem.

Post by antiscab » Thu, 17 Oct 2019, 22:24

That's certainly weird

doing a motor calibration may help (it's easy to do and there's no harm in doing it)
turn ignition off. lift rear wheel off the ground (a car jack usually does the trick)
to get the mc to calibrate, you have to simultaneously hold the throttle at full, have the left brake on and turn the ignition on.
repeat the above but use the right brake this time (this is because I can't remember if its the left or the right brake. one just turns the rear wheel slowly, the other does the calibration)

also check neutral throttle position - kill switch to off positon and pull left brake. the speedo will move to show throttle position as reported to the CAN bus. it should be 47 from memory
Note: as these bikes get older, the kill switch gets dicky. it might take a few tries to get it back to the on position.
the throttle position one would be good to do whilst it's actually faulting out
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

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Richo
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Re: Vectrix acceleration and throttle problem.

Post by Richo » Fri, 18 Oct 2019, 12:36

antiscab wrote:
Thu, 17 Oct 2019, 22:24
...you have to simultaneously hold the throttle at full, have the left brake on and turn the ignition on.
So three hands...

Go engineering :lol:

Image
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!

antiscab
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Re: Vectrix acceleration and throttle problem.

Post by antiscab » Fri, 18 Oct 2019, 13:38

Richo wrote:
Fri, 18 Oct 2019, 12:36
antiscab wrote:
Thu, 17 Oct 2019, 22:24
...you have to simultaneously hold the throttle at full, have the left brake on and turn the ignition on.
So three hands...
doesn't every technician have to go full octopus once in a while?

the trick is to trap the throttle with your elbow whilst using the same arm to turn the ignition on......I should post a video
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

wovenrovings
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Re: Vectrix acceleration and throttle problem.

Post by wovenrovings » Sat, 19 Oct 2019, 08:27

Ok I am going to give it a go. :shock: :lol:

wovenrovings
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Re: Vectrix acceleration and throttle problem.

Post by wovenrovings » Sat, 19 Oct 2019, 09:15

So I tried all those things. Held the combination until the spanner light went out. Throttle calibration was at 40 so I tweaked it up to 45.
Also decided to have a look at the encoder on the motor to make sure nothing had come loose, it had played up couple of times after particularly rough sections of road. All seemed fine. The plastic cover didn't seem to sealing very well and had some cracks. So I resealed it with silicon and the cracks as well. Encoder didn't look like it would appreciated moisture.
Once that is cured I will take it for a ride....
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wovenrovings
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Re: Vectrix acceleration and throttle problem.

Post by wovenrovings » Sun, 20 Oct 2019, 19:35

No sign of the problem returning yet... Will just have to wait and see.

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Richo
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Re: Vectrix acceleration and throttle problem.

Post by Richo » Mon, 21 Oct 2019, 12:48

wovenrovings wrote:
Thu, 17 Oct 2019, 17:31
I would be accelerating and suddenly acceleration would become regen and vise versa.
There are 2 are things that could cause this:
1. The brake is coming on - check the brake switche(s) and the wiring to the controller.
2. The hall sensor/wires in the throttle is damaged
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!

wovenrovings
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Re: Vectrix acceleration and throttle problem.

Post by wovenrovings » Tue, 22 Oct 2019, 17:54

Alright, thanks Richo.

wovenrovings
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Re: Vectrix acceleration and throttle problem.

Post by wovenrovings » Wed, 30 Oct 2019, 19:01

So there is something weird going on.
The acceleration problem happened again and this time I noticed it made noise when trying to accelerate similar to when I tried to spin the motor with out the encoder plugged in. There was no acceleration or regen. And it didn't draw any amps either. I rolled to a stop and then when I stopped there was a clunk from the motor and it everything returned to normal. No restart required. So, as per Richo's advice, I see pulling the covers off to check all the connections in my future..

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Richo
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Re: Vectrix acceleration and throttle problem.

Post by Richo » Thu, 31 Oct 2019, 12:40

It does kind of point to the encoder connector or the board is dirty.
The PCB AND components should have a shiny clear coat over it.
If it doesn't I'd suggest disconnecting the connector/power to it cleaning it with IPA and then coating it with PCB Lacquer.
Make sure the connector holes and pins are covered before coating.

Also check the connector on the wire end to see if there is any corrosion on the contacts.

The other issue is if the cable was pulled at some stage breaking a wire and causes an intermittent connection.
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!

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