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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    Instrument panel
    Engine switch Starting the engine/changing the positions*1 Starting the engine/changing the modes*2 Emergency stop of the engine When the engine will not start Warning messages Shift lever Changing the shift position Precautions for towing When the shift lever does not move Meters Read ...

    Heater & air conditioner
    Service data Torque specification Supplemental restraint system Torque specification Seat belt Torque specification Wiper & washer Torque specification Audio & visual system Torque specification Instrument panel/meter Torque specification Seat Torque sp ...

    Sound quality is bad in all modes (volume is too low)
    Wiring diagram Inspection procedure 1 Adjust sound quality Adjust the sound quality.  Operate the radio receiver assy to adjust the sound quality. Standard: malfunction disappear. 2 Compare it with another car of same model Compare it with another vehicle of the same mo ...