Diagnostic software-

[Wiltshire Warrior]

I have VAG-Com for my cars but I cant find anything to read the error codes on my my bike - has anyone found a solution.

 

[Gary]

This sort of thing?
Bosch eBike Error Codes
Or do you mean can't you actually read the code ?

 

[Wiltshire Warrior]

HI Gary - last 2 rides I have been getting 503 (no speed detected ) so I put a new magnet on (lined up with the sensor bar) and it worked for a while (3-4 miles) then errored again- but on and off (mostly on) for a 25ish mile ride yesterday.

its been on the shop computer today and no errors have been recorded.

very frustrating! I think I will have to fit a new speed sensor - to try and rule it out?

 

[Gary]

Sorry. mate .I don't know my way around a bosch. Just sharing that link to the code readings.
As with my Shimano I'd be checking connections first (after the sensor/magnet alignment). Take out each connector (Sorry. don't know if this is the case with your motor) Give everything a clean and grease and make sure the connections are sound,

 

[Wiltshire Warrior]

SOLVED - No thanks to Rutland Cycles or the Potatoe heads in Hargroves Cycles.

I decided to order a new sensor cable and strip it ready to fit the new one later this week

The motor had to come out in order to free the sensor wire, dead easy just 2 bolts and 2 torx and 1 Allen.

And to my delight I found that the sensor wire had been crushed:

This has got to be the cause of my intermittent problem.

I will take my time fitting the new one to make sure this doesnt happen again - mind you - at worst it lasts about 350 miles before it starts to play up!!!!

FYI mine was crushed (roughly) where it fits over the back of the motor.

Also all my connections were bone dry:

 

[Gary]

That is one clean frame

Glad to hear you got to the bottom of your problem

 

[R120]

Sounds like a sloppy job installing it out the factory

 

[Doomanic]

That is one clean frame

Well, it is a road bike...

 

[galaga187]

Well, it is a road bike...

Funny roads around here - a bit ancient. ?

 

[R120]

Looks like most of the roads round me

 

[Wiltshire Warrior]

Funny roads around here - a bit ancient. ?

View attachment 8197

this is the entrance to West Woods from the Wansdyke Path

Wansdyke Path - LDWA Long Distance Paths

 

[Wiltshire Warrior]

and here are at the summit of Golden Ball Hill, if only to prove that these bikes really do give you wings.......

 

[Gary]

Oh my vertigo's starting up again.

best have a lie down

 

[Wiltshire Warrior]

Back on topic

While I wait for the new sensor to arrive (which will be my shed spare for any future testing) I have discovered that I can reroute the wire from the rear of the chain stay (internally) to exit with the brake hose - much further up and closer to the suspension pivot - which mean the cable wont have to flex as much. Also I can flip the sensor 180 deg (to make it point backwards) and it creates a 10mm gap (instead of 17mm) on the magnet due to being nearer the hub, also this way round the magnet is easier to line up as the sensor line has the bosch logo paralel to it!

The only issue with this is the brake hose hole in the stay wont fit the sensor plug through - but the cable will fit- so as I have a knackered section of cable I have nothing to lose by cutting the pinch out and soldering a new section of wire in to allow this routing

The individual wires are 2mm so I have a nice little soldering and heat shrink job on.

 

[R120]

Are you sure you want to internally route it if it means splicing the cable? - the sensor cable is a pretty common failure point on many bikes, not just bosch, personally i would want to be able to swap it out easily

 

[Wiltshire Warrior]

Are you sure you want to internally route it if it means splicing the cable? - the sensor cable is a pretty common failure point on many bikes, not just bosch, personally i would want to be able to swap it out easily

Soldering is easy but then again I can solder like a brain surgeon - and I enjoy it.