Toyota Corolla (E120): Circuit description

This is the power source of the ecu, hence the actuators.

Wiring diagram

Wiring diagram

Inspection procedure

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    Content of driving information
    ■ Display items Speedometer display/Driving range Fuel economy Eco Driving Indicator/Driving range ■ Speedometer display/Driving range Speedometer display Driving range Displays driving range with remaining fuel. Use the displayed values as a reference only. This distance is computed ...

    Malfunction in tachometer
    Wiring diagram Inspection procedure Check output value of ecm.  Connect the hand–held tester to dlc3. Turn the ignition switch to on and push the hand–held tester main switch on.  Select the data list mode on the hand–held tester. 2 Inspect combinatio ...

    Inspection procedure
    Hint: hand–held tester only: narrowing down the trouble area is possible by performing ”a/f control” active test (heated oxygen sensor or other trouble areas can be distinguished). Perform active test using hand–held tester (a/f control). Perform active test using the hand–held ...