Some drivers retain a fault state until an appropriate recovery condition occurs. The output may remain off even after the event that triggered protection has ended.

What to check next

Preserve the first fault record and compare it with the controller’s current status. Establish the cause of the original event before following the supported reset or recovery process. Otherwise a reset may appear successful while the same overload or wiring fault remains.

Useful information for an enquiry

Send the sequence from first failure to any restart or reset.

A latched fault should not be defeated by modifying the circuit. The reset procedure and verification depend on the system.

Speak to AXION

For complex vehicle-electronics diagnostics, send your vehicle details and fault report. Workshop assessment is in Didcot, Oxfordshire. Suitable postal or remote work is confirmed before booking.

Technical background from Texas Instruments. The referenced design explains the principle; the vehicle-specific procedure determines the repair.