Toyota Tacoma manuals

Toyota Corolla Repair Manual: Check and replace ecu

Notice

: start an inspection of the connector from the backside of the connector on the wire harness side with the connector connected to the ecu.

When no measurement condition is specified, perform the inspection with the engine stopped and also the ignition switch on.

  1. First check the ecu ground circuit. If it is faulty, repair it.

    If it is normal, the ecu could be faulty. In this case, replace the ecu with one that functions normally and check if the symptoms appear.

  1.  Measure the resistance between the ecu ground terminal and body ground.

    Resistance: 1 Ω or less

  1. Disconnect the ecu connector, check the ground terminals on the ecu side and wire harness side for bends and check the contact pressure.

Terms

Check short circuit
If the wire harness is ground shorted as shown in fig. 5, Locate the section by conducting a resistance check with the body ground in step (b). Check the resistance with the body grou ...

Terms
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Other materials:

Caring for special components
Light-alloy wheels When cleaning the vehicle, use only neutral wheel cleaners having a pH value from 5 to 9. Do not use abrasive cleaning agents or steam jets above 140 ℉/60 ℃. Follow the manufacturer's instructions. Aggressive, acidic or alkaline cleaning agents can destroy the protective lay ...

Screen for general settings
1 Press the SETUP button. 2 Select General on the Setup screen. 1 English, Français or Español can be selected. 2 On/off can be selected to sound beeps. 3 Select to change the screen color. 4 Select to change the keyboard layout. 5 The animation effect for the screen ...

Abbreviations used in this manual
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