Toyota Corolla (E120): Problem symptoms table

If a normal code is displayed during the dtc check but the problem still occurs, check the circuits for each problem, symptom in the order given in the table below and proceed to the relevant troubleshooting page.

Actuator motor circuit

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    Circuit description
    The variable valve timing (vvt) system includes the ecm, the oil control valve (ocv) and the vvt controller. The ecm sends a target ”duty–cycle” control signal to the ocv. This control signal, applied to the ocv, regulates the oil pressure supplied to the vvt controller. Camshaft timin ...

    Cd sound skips
    Inspection procedure 1 Disc cleaning Disk cleaning ) if the disk gets dirty, clean the disk by wiping the surface from the center to outside in the radial directions with a soft cloth. Notice: do not use a conventional record cleaner or anti–static preservative. Standard: ...

    Engine immobilizer system
    The vehicle’s keys have built-in transponder chips that prevent the engine from starting if a key has not been previously registered in the vehicle’s on-board computer. Never leave the keys inside the vehicle when you leave the vehicle. Vehicles without a smart key system: The indicator li ...