Curtis 1239E Programming Notes via Spyglass
5/29/2023

See   HPEVS Spyglass Program Instructions for details. 

Normal Neutral Braking
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Default is 15% which is about 30 amps on the e-Stang.  50 amps peak charging is allowed for Valence 100 Ah which is 25%.  
Note: this is not a robust solution:
- If battery is fully charged, regen should be disabled, and a dedicated yellow warning light saying so should be illuminated.
- Max continuous charge current is 20 amps, so driving down a long hill could overheat or otherwise damage the batteries.
Immediate solution for a long hill is to disconnect the clutch NC switch and connect 12V to CLU so neutral braking is always disabled.  7%/15 amp braking will be max per default.
Short term solution is to add region disable switch on dash with its own yellow light to be used not only for slippery conditions such as heavy rain, but also on downhills when pack is fully charged and long downhills.
Long term solution is a microcontroller VMS that cuts back regen as the max voltage goes above 4V or the max cell temperature goes above 60C.

1. Turn car off — ignition off and charger unplugged.
2. Press and hold down Menu button.
3. Turn on ignition.  After several seconds “Ready” message comes up on Spyglass.
4. Release Menu button. In several seconds “RdyProg” message appears.
5. Press Menu button 3 times until “CrntLimit” is displayed.  This will bring up a scrolling list of current limits that can be set.
6. When you see “NrmN 15%” click Menu button 10 times rapidly to increment to 25% in 1% intervals.  Then the scrolling list of current limits that can be set resumes, with “Save?” added to the end of the list.
7. When “Save?” is displayed press and hold down Menu button.
8. When “Release” is displayed, release Menu button.
9. Turn off ignition.

To verify the change occurred, repeat steps 1 through 5 to get scrolling list of current limits that can be set.  Then verify “NrmN 25%” is displayed.  If so then turn off ignition.