Mazda common ECU failure symptoms

All Mazda cars fitted with Mitsubishi Electric electronic distributors are prone to breakdown caused by electronic failure of distributor. We can rebuild some types but in most cases we will need to see the distributor before quoting for a rebuild. Please can you complete the quotation request form found by clicking HERE.


    1) Vehicle suffers breakdown when engine warms up. Usually this starts as a rare occurence but gets worse with time. Breakdown services diagnose breakdown caused by loss of spark. Vehicle usually restarts when allowed to cool down.


    1) If possible, try to confirm that vehicle breakdown is due to loss of spark by connecting test spark plug as soon as possible after breakdown. DO NOT TRY THIS IF YOU ARE NOT QUALIFIED TO CARRY OUT SUCH TESTS - MODERN IGNITION SYSTEMS HAVE SPARK VOLTAGES IN EXCESS OF 50,000 VOLTS AND CAN CAUSE FATAL ELECTRIC SHOCK - CALL IN SPECIALIST
    2) If no spark, check security of all wiring associated with distributor and ignition system. Look for cracked or damaged wiring.
    3) Note that SOME immobiliser systems operate by inhibiting igntion system. Immobiliser system may be suspect if there is a history of intermittent non-start rather than break down when vehicle is actually being driven.

For ECU repair and rebuild quotation please use form found from this page.

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