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EL DIARIO TÉCNICO DE ECUTRONICRepairs, faults
Repairs, faults
and how to check them.
Which repairs can be done, how to check your car and known faults, explained in plain words.
Publicaciones11
Faults and diagnosis04.11.2026
Short guide: ABS/ESP — pump, communication loss and warning lamp
Symptoms, external checks and data to gather to assess an ABS/ESP unit before sending.
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Faults and diagnosis02.11.2026
Brief guide: instrument clusters — blackouts and loss of communication
What to check before assessing the unit: common symptoms, external checks and data to collect for diagnosis or return.
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Faults and diagnosis29.10.2026
Guide: Engine ECU — internal faults and injection/throttle control
Quick guide on symptoms, external checks and data to collect when the engine ECU shows internal faults or injector/throttle control DTCs.
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Faults and diagnosis27.10.2026
Brief guide: Mercedes start‑error — parts required and external checks
What to check for a Mercedes 'start error' (EZS/ELV): symptoms, external checks and information to assess the unit.
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Faults and diagnosis22.10.2026
Short guide: ABS/ESP — pump, lost communication and warning lights
Practical summary: symptoms, exterior checks and data to assess ABS/ESP control unit.
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Faults and diagnosis21.10.2026
Short guide: Airbag/SRS system — components, symptoms and external checks
Practical summary for external SRS diagnosis: what changes, what to check and what information to gather.
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Faults and diagnosis20.10.2026
Brief guide: start authorization (EZS/ELV) and required documentation
What to provide to the workshop for EZS/ELV diagnosis: documents, keys and vehicle data before assessing the unit.
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Faults and diagnosis19.10.2026
Guide: instrument cluster dark / communication loss
What to check when the cluster is dark or refuses diagnostic communication.
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Faults and diagnosis06.10.2026
BMW E87: failed exterior lights and the FRM module
On the 2005 E87, an electrical fault can cause the FRM to disable a lighting output. Find and correct the cause before resetting the module according to the manufacturer’s procedure. Failed lights alone do not confirm a faulty FRM.
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