Toyota Corolla (E120): Circuit description

When the idle switch is turned on, a signal is sent to the cruise control ecu assy. The cruise control ecu assy uses this signal to correct the discrepancy between the throttle valve position and the actuator position sensor values to enable accurate cruise control at the set speed. If the idle switch is malfunctioning, problem symptoms also occur in the engine, so also inspect the engine.

Wiring diagram

Wiring diagram

Inspection procedure

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    Starting the engine
    1 Continuously variable transmission: Ensure that the shift lever is in P and depress the brake pedal. Manual transmission: Shift the shift lever to N and depress the clutch pedal. 2 Touch the Toyota emblem side of the electronic key to the engine switch. When the electronic key is detected, a ...

    If the vehicle battery is discharged
    The following procedures may be used to start the engine if the vehicle’s battery is discharged. You can also call your Toyota dealer or a qualified repair shop. If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt battery, you can jump start your vehicle by fo ...

    Inspection procedure
    Hint: start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not using the hand–held tester. 1 Perform active test by hand–held tester(abs motor relay) Check the operation sound of the abs motor individually when operaing it with the ...