Bosch HMI, changing from Kilometers to Miles...accidentally.

Blew it

Esteemed Pedelecer
Jun 8, 2008
1,472
97
Swindon, Wiltshire
After three winters of struggling to change modes when wearing thick gloves, I decided to upgrade my 2011 Haibike eq Trekking with an Intuvia display. The two large up/down buttons on the remote are so much easier to operate during the Winter. The first time I switched on with the Intuvia fitted, it immediately demanded "Pls update software". Clearly, the Intuvia had discovered the drive was set for 50 Nm when interrogating the system, as it does at every switch-on. Sometime during 2013, the Bosch guys decide to reduce the drives output to 48 Nm (or thereabouts) when fitted to machines with geared hubs, including the SRAM Dual-Drive as fitted to my Haibike.

Speaking as one who is not well known for giving in to the whims of electronic devices, I fiddled about until I discovered that quickly pressing one of the up/down buttons circumvented the "update" message and allowed the machine to be ridden normally, which I continued to do for several hundred miles during last Winter. All was fine until I decided to go for a long ride on the first warm day of Spring.

Fed up to the eyeballs with an endless list of domestic chores, I hopped on the bike and went for a good ride-out. On the way home, with twenty-eight miles on the clock and another three to go with just one bar left on the battery, I stopped for a chat with an old chum...and it took six attempts to get the system to power up after the stop. After a lot of failed power-ups, it finally started assisting and I finished the journey. It was also the end of the Intuvia display upgrade.

1) I was not agreeable to the power being reduced below 50 Nm, the SRAM Dual-Drive has coped well with many hundreds of miles, including regularly climbing 18% slopes in Turbo mode.

2) I found constantly farting about with buttons when powering up a bit tedious and, the system was unreliable when the battery was approaching empty.

A small hard-rubber "knob" was super glued to the HMI "mode" button allowing easy operation when wearing thick gloves. The machine is now back to original spec.

The bonus? The HMI unit now displays all fields in miles instead of kilometers. So, If you want to change your HMI display from kilometers to miles (the hard way) just temporarily plug in an Intuvia, change the preference and then plug the HMI back in.....simples! :)

Today's ride. 18 miles on the clock, another 22 possible.

 

Martin@e-bikeshop

Esteemed Pedelecer
Blew It,

The 'Perform Software update' is not just to do with the torque, its to change the values of the assistance among many other things.

You can get the 2013/2014 Intuvia working with the older 2012 system no problem with a Diagnostic Scan. We can re-flash the motor software to cope with the new Intuvia display.

The reason your KPH has changed is because the newer system can be adjusted in units by the end user. The older system cannot without the appropriate diagnostics equipment. So therefore by changing the Intuvia to MPH this has linked to the software stored in the drive unit and changed it to MPH.

The total miles etc is likely to be the same and this is all clocked in the drive unit itself, not the head unit.

We can get everything working with the new Intuvia display and older drive unit. All except the 'Walk Assistance' mode button.

You should fit the Intuvia display back on and get me to re-flash it. The new display is much clearer and easier to see / read. Its also handy having the buttons on the left.

Regards
Martin
 

Blew it

Esteemed Pedelecer
Jun 8, 2008
1,472
97
Swindon, Wiltshire
Hi Martin, thanks for the information regarding the update. As I have now solved the problem of changing modes when wearing thick gloves, I have now decided to leave the HMI on the machine.

My 2013 AVE XH-7 revealed the updated drive characteristics the very first time I rode it but, as I ride in a very moderate terrain It is not something which would be advantageous on my older Haibike.

The Intuvia display will be retained as a spare for the XH-7. Needless to say, your kind offer of assistance is very much appreciated.
Best regards.
Bob