Detection circuit on the keypad has an error

Stop riding Last verified: pending review Reviewed by: editorial team

Quick answer

Error code 36 signifies a fault in the detection circuit associated with the keypad on the display. This error prevents the system from properly recognizing inputs from the keypad, which is essential for operating the e-bike. The display will show this error code when the issue is detected.

Stop riding Display / cockpit Often DIY-friendly Intermediate (30–60 min)

Does this apply to your bike?

H700 · Bafang · Common displays: DP E171

Heads-up: the same number can mean different things on other systems — always check your drive system first. Browse all drive systems →

What you’ll notice

The display shows error code 36, indicating a keypad detection issue.

Likely causes, ranked

Start at #1 — causes are ordered by how often they turn out to be the problem.

#1 Loose or Damaged Connectors

How to check: Inspect the display cable and connectors for any signs of looseness, corrosion, or damage.

#2 Faulty Display

How to check: Test the display by connecting it to a different controller or using diagnostic tools.

#3 Controller Malfunction

How to check: Check the controller's functionality and connections to ensure it is operating correctly.

Troubleshooting steps

Inspect Display Connectors

easy

Check the display cable and connectors for loose, corroded, or damaged pins.

If it passes →Proceed to update the controller.

If it fails →Clean or repair the connectors.
Update Controller Using BESST

Tools: BESST tool intermediate

Connect the pedelec to the BESST tool and perform a controller update.

If it passes →Check if the error is cleared.

If it fails →Replace the display.
Replace Display

intermediate

If the error persists, replace the display unit with a new one.

If it passes →Check if the error is cleared.

If it fails →Replace the controller.
Replace Controller

advanced

If the display replacement does not resolve the issue, replace the controller.

If it passes →Check if the error is cleared.

If it fails →Contact Bafang support.

When to stop and get professional help

If the error persists after replacing the display and controller, seek professional assistance.

Never open, puncture, or disassemble the battery pack, and never bypass the BMS. See our safety guide.

More codes for H700

30 · Communication failed 33 · Brake detection circuit is fault 35 · Detection circuit for 15V has an error 37 · WDT circuit fault 41 · Total voltage from the battery is too high/low 42 · Total voltage from the battery is too high/low

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Sources & verification

Last verified: pending review Reviewed by: editorial team

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