Toyota Workshop Service and Repair Manuals > Highlander 2WD V6-3.0L (1MZ-FE) (2003) > Relays and Modules | Relays and Modules - Accessories and Optional Equipment | Alarm Module, (Vehicle Antitheft) | Component Information | Testing and Inspection | Engine Immobilizer System

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b. Using an oscilloscope, inspect the waveform.

NOTE: The waveform provided on this text does not include noise and chattering.

HINT: If the result is not as specified, the ECM may malfunction.

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