Toyota Corolla (E120): Circuit description

This circuit sends a signal to the cruise control ecu assy that dtc output is required.

Wiring diagram

Inspection procedure

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    The battery supplies electricity to the ecm even when the ignition switch is off. This electricity allows the ecm store data such as dtc history, freeze frame data, fuel trim values, and other data. If the battery voltage falls below a minimum level, the ecm will conclude that there is a fault ...

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