Guide: Engine ECU — internal faults and injection/throttle control
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Quick guide on symptoms, external checks and data to collect when the engine ECU shows internal faults or injector/throttle control DTCs.
Qué ocurre
MIL on, intermittent power loss, rough running, DTCs like P06xx/P15xx/P02xx for injectors/throttle, failed basic adaptation.
Qué conviene comprobar
Read fault memory and freeze frame; check ECU supply and grounds at connector; inspect continuity on injector and throttle actuator circuits; verify 5 V reference and throttle position sensor signal; inspect connectors for damage.
El siguiente paso
Collect: full DTC list with freeze-frame, pin voltages (supply/ground/5 V), scope or multimeter signal traces at rest and under command, repair history. Consider ECU specialist evaluation only after excluding wiring and actuator faults.
