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

Toyota Corolla (E120): How to troubleshoot ecu controlled systems

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On–vehicle inspection
1. Check battery electrolyte level Check the electrolyte quantity of each cell (maintenance–free battery).  If under the lower level, replace the battery (or add distilled water if possible) and check the charging system.  check the electrolyte quantity of each cell ...

Odometer and trip meter display
■ Changing the display Press the display change button until the desired item is displayed. ■ Display items Odometer Displays the total distance the vehicle has been driven. Trip meter A/Trip meter B Displays the distance the vehicle has been driven since the meter was last reset. Trip ...

Customer problem analysis
Hint: in troubleshooting, the problem symptoms must be confirmed accurately, meaning that all preconceptions must be set aside in order to make an accurate judgement. To ascertain what the problem symptoms are, it is extremely important to ask the customer about the problem and cond ...