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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    Inspection
    1. Cooler thermistor no.1 Check resistance between terminals 1 and 2 of cooler thermistor no. 1 At each temperature, as shown in the chart. Resistance: If resistance value is not as specified, replace the sensor. 2. Cooler and accessory assy Inspect blower switch contin ...

    Power outlet
    Please use as a power supply for electronic goods that use less than 12 VDC/10 A (power consumption of 120 W). Open the lid. ■The power outlet can be used when ► Vehicles without a smart key system The engine switch is in the “ACC” or “ON” position. ► Vehicles with ...

    Overhaul
    1. Remove oil pump relief valve Remove the oil pump relief valve plug, oil pump relief valve spring and oil pump relief valve.  Oil pump relief valve plug  oil pump relief valve spring  oil pump relief valve 2. Inspect oil pump assy Remove 3 screws and o ...