Throttle stuck / starts by itself

Possible causes

General, component-based causes – not a manufacturer-specific statement.

• Throttle does not return to zero
• Throttle Hall sensor or cable fault
• Connector corrosion/water ingress

Safe test steps

• Check mechanical return.
• With the known pinout: supply, GND, signal at rest and fully open.

Workshop reference values

• Common Hall throttle: ~5 V supply, signal ~0.8–0.9 V at rest, ~4.2 V full (type-specific, not a manufacturer value).

Repair approach

• Clean/repair the throttle or replace with the same type.

Tools needed

• Digital multimeter (CAT III, fused inputs)
• Back-probe pins