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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    Aluminum wheel precautions (if equipped)
    ● Use only Toyota wheel nuts and wrenches designed for use with your aluminum wheels. ● When rotating, repairing or changing your tires, check that the wheel nuts are still tight after driving 1000 miles (1600 km). ● Be careful not to damage the aluminum wheels when using tir ...

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