Toyota Corolla (E120) 2002–2008 Repair Manual / Introduction / How to troubleshoot ecu controlled
systems / Problem symptoms table
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.

Other materials:
USB Port/AUX Port
Connect an iPod, USB memory device or portable audio player to the USB/AUX
port as indicated below. Select “iPod”, “USB” or “AUX” on the audio source selection
screen and the device can be operated via multimedia system.
Connecting using the USB/AUX port
■ iPod
Open the cove ...
Towing with a wheel-lift type truck
► From the front
Release the parking brake.
► From the rear
Use a towing dolly under the front wheels.
Vehicles without a smart key system: When not using a towing dolly, turn the
engine switch to the “ACC” position and shift the shift lever to N.
Vehicles with a smart key ...
Circuit description
The o/d main switch (transmission control switch) is a momentary type switch.
When pressing the o/d main
switch, the o/d off indicator light lights up and the ecm prohibits shifting
into o/d, and when pressing it
once again, the o/d off indicator light goes off and the ecm allows shifting
in ...


