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Home >> Lexus >> 2003 >> GX 470 V8-4.7L (2UZ-FE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Alarm Module >> Testing and Inspection >> Engine Immobilizer System
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Engine Immobilizer System

TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER

Terminals Of ECU/Pinouts:







a. Disconnect the I17 amplifier connector, and check the continuity of each terminal of the wire harness side connector.




b. Reconnect the I17 amplifier connector. and check the continuity or voltage of each terminal of the connector.

Oscilloscope Waveform:




Oscilloscope Waveform:




c. Inspect using an oscilloscope.

2. CHECK TRANSPONDER KEY ECU ASSY







a. Disconnect the T9 ECU connector, and check the voltage or continuity between each terminal of the wire harness side connector.







b. Reconnect the T9 ECU connector, and check the voltage between each terminal of the connector.

Oscilloscope Waveforms:




c. Inspect using an oscilloscope.

3. CHECK ECM







a. Disconnect the E7 and E8 ECM connectors, and check the voltage or continuity between each terminal of the wire harness side connectors.

Oscilloscope Waveforms:




b. Inspect using an oscilloscope
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