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Home >> Lexus >> 2004 >> 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

Terminals Of ECU/Pinouts - Check Transponder Key Amplifier:




1. CHECK TRANSPONDER KEY AMPLIFIER




a. Disconnect the I17 amplifier connector, and check the continuity of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.




b. Reconnect the I17 amplifier connector, and check the continuity or voltage of each terminal of the connector.
If the result is not as specified, the amplifier may have a malfunction.







c. Inspect using an oscilloscope.

Terminals Of ECU/Pinouts - Check Transponder Key ECU Assy:




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.
If the result is not as specified, there may be a malfunction on the wire harness side.







b. Reconnect the T9 ECU connector, and check the voltage between each terminal of the connector.
If the result is not as specified, the transponder key ECU assy may have a malfunction.




c. Inspect using an oscilloscope.

Terminals Of ECU/Pinouts - Check ECM:




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.
If the result is not as specified, there may be a malfunction on the wire harness side.




b. Inspect using an oscilloscope.
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