Toyota Corolla (E120): Tvip ecu communication circuit

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Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system. If the malfunction indicator lamp comes on The OBD system determines that a problem exists somewhere in the emission cont ...

Circuit description
The ignition switch provides circuit power and the ecm provides the circuit ground that illuminates the mil. Mil operation is checked visually: it should be illuminated when the ignition is first turned on. If the mil is off all of the time or on all of the time, use the procedure below to ...

Listening to a USB memory device
Connecting a USB memory device enables you to enjoy music from the vehicle speakers. Touch “USB” on the audio source selection screen. Connecting a USB memory device Audio control screen Pressing the “AUDIO” button displays the audio control screen from any screens of the selected so ...