Toyota Corolla (E120): Problem symptoms table

The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to troubleshoot the problem when a normal code is displayed in the diagnostic trouble code chart but the problem is still occurring. Numbers in the table indicate the order in which the circuits or parts should be checked.

Hint: when the problem is not detected by the diagnostic system even though the problem symptom is present, it may be that the problem is occurring outside the detection range of the diagnostic system.

Circuit inspection

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    Overhaul
    1. Remove oil filler cap sub–assy Remove the oil filler cap from the cylinder head cover. 2. Remove oil filler cap gasket Using a screwdriver, remove the gasket from the oil filler cap. 3. Remove ventilation valve sub–assy Remove the ventilation valve from the cyl ...

    Starting the engine
    1 Check that the parking brake is set. ► Vehicles without a multi-information display 2 Continuously variable transmission: Check that the shift lever is set in P. Firmly depress the brake pedal. Manual transmission: Check that the shift lever is set in N. Firmly depress the clutch peda ...

    PCS (Pre-Collision System)
    The pre-collision system uses sensors to detect objects in the path of the vehicle. When the system determines that the possibility of a frontal collision with a detectable object is high, a warning operates to urge the driver to take evasive action and the potential brake pressure is increased to h ...