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Home >> Toyota >> 2004 >> Sienna AWD V6-3.3L (3MZ-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 (COIL)




a. Disconnect the I14 amplifier connector, and check the resistance between the terminal of the wire harness side connector and body ground.




Standard:

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

b. Reconnect the I14 amplifier connector, and check the resistance or voltage of each terminal of the connector.




Standard:

If the result is not as specified, the amplifier may have a malfunction.







c. Inspect using an oscilloscope.

2. CHECK TRANSPONDER KEY ECU ASSY




a. Disconnect the T6 ECU connector, and check the voltage and resistance between each terminal of the wire harness side connector.




Standard:

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

b. Reconnect the T6 ECU connector, and check the voltage between each terminal of the connector.




Standard:

If the result is not as specified, the ECU may have a malfunction.




c. Inspect using an oscilloscope.

3. CHECK ECM




a. Disconnect the E4 and E7 ECM connectors, and check the voltage or resistance between each terminal of the wire harness side connectors.




Standard:

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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