Ich habe mal mit Grok diskutiert
Wie immer ist das etwas eskaliert. Ich erspare euch den ganzen Dialog. Ich wollte nur wissen was alle 18 Sekunden einen Dash-Reset auslöst und ob das Gas über Can-Bus läuft (tut es nicht, wird aber zwischen MBB und Dash auf dem Canbus kommuniziert). Die 18 Sekunden resultieren also aus meiner Fragestellung. Der Schluss ist witzig.
A dashboard resetting every 18 seconds on a Zero Gen2 motorcycle (2013+ SDS Platform) likely points to an electrical or communication issue, possibly related to the 12V system or the CAN bus network. Here are the potential causes and troubleshooting steps based on available information:
Potential Causes
12V System Instability:
The dashboard relies on the 12V circuit, powered by the DC-DC converter. A loose connection, blown fuse, or failing converter can cause intermittent power loss, leading to dashboard resets.
Common issues include a blown high-voltage input fuse to the DC-DC converter, a loose connector, or a broken ground/negative line in the 12V wiring bundle (often near the tank area).
If the 12V system drops out, the dashboard may lose power and reset.
CAN Bus Communication Failure:
The dashboard communicates with the Main Bike Board (MBB) via the CAN bus. A disruption in CAN bus signals (e.g., due to noise, loose wiring, or a faulty MBB) could cause the dashboard to lose sync and reset.
The MBB sends data like throttle position, speed, and error codes to the dashboard over CAN (e.g., frame 0x281). A glitch here might trigger a reset.
Faulty Dashboard or Wiring:
A defective dashboard unit or damaged wiring to the dashboard could cause it to malfunction and reset periodically.
Moisture ingress from rain or pressure washing can lead to shorts or corrosion in connectors, especially if the bike isn’t fully weatherproofed.
MBB or BMS Issues:
A malfunctioning MBB or Battery Management System (BMS) could send erratic signals or fail to maintain a stable session with the dashboard, causing resets.
BMS-related errors have been reported to cause dashboard issues, like flashing 00% battery or error lights.
Firmware or Software Glitch:
A bug in the MBB or dashboard firmware might cause periodic resets, especially if the bike’s firmware hasn’t been updated or if there’s a known issue with the model year.
Troubleshooting Steps
Check the 12V System:
Inspect the DC-DC converter’s high-voltage input fuse and connectors for looseness or damage. Replace any blown fuses (e.g., Eaton JJN-100 or equivalent 200V-rated fuse).
Verify the ground/negative line in the 12V wiring bundle, especially on the left side of the tank area. Look for corrosion or loose connections.
Test the DC-DC converter output with a multimeter (should be ~12-14V). If faulty, it may need replacement.
Inspect CAN Bus and Wiring:
Check CAN bus wiring and connectors between the MBB and dashboard for loose pins, corrosion, or damage. Ensure connectors are dry and apply dielectric grease if exposed to moisture.
Look for signs of water ingress in the dashboard or MBB connectors, especially if the bike was ridden in rain or pressure-washed.
Perform a BMS Reset:
Follow the BMS reset procedure to rule out BMS-related errors. For 2015+ models, try a software reset first, then a hardware reset if needed (consult the Unofficial Zero Manual for steps).
After resetting, check if the dashboard stabilizes and monitor for error codes via the dash display (switch to error code mode).
Check Dashboard and MBB:
If possible, connect to the bike via the Zero NextGen App (v2.10.0 or later) to pull logs and check for MBB errors. Blip the throttle occasionally to prevent timeout during log downloads.
If the dashboard is suspected to be faulty, consider replacing it (see guides like the one on Elektricbikes.com for LCD dash replacement).
Inspect for Environmental Factors:
If the bike was exposed to water, dry out connectors (e.g., accessory charging port, MBB, or dashboard) and apply dielectric grease to prevent future shorts.
Ensure the bike wasn’t pressure-washed, as this can force water into sensitive electronics.
Update Firmware:
Check with a Zero dealer or the NextGen App for firmware updates for the MBB or dashboard. Some reset issues may be resolved with newer firmware.
Additional Notes
The 18-second reset interval suggests a timed power or communication dropout, possibly tied to a watchdog timer in the MBB or dashboard firmware. This is speculative but aligns with periodic resets.
If the bike operates normally (e.g., motor runs, throttle responds) despite the dashboard resetting, the issue is likely isolated to the 12V system or dashboard itself rather than the high-voltage system or motor controller.
If you have access to a CAN bus analyzer or diagnostic tool, you could monitor CAN frames (e.g., 0x281) for dropouts or errors during resets.
Next Steps
Start with the 12V system checks, as they’re the most common cause of dashboard issues.
If the problem persists, share the specific model/year and any error codes displayed (use the dash’s error code mode) for more tailored advice.
If you’re not comfortable troubleshooting, contact a Zero dealer or check the Electric Motorcycle Forum for community insights.
