Engine Immobiliser System

ENGINE IMMOBILISER SYSTEM:

TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





(a) Disconnect the I14 amplifier connector.
(b) Measure the resistance of the wire harness side connector.





If the result is not as specified, there may be a malfunction on the wire harness side.
* 1 : 3MZ-FE Coupe, 2AZ-FE
* 2 : 3MZ-FE Convertible
(c) Reconnect the I14 amplifier connector.
(d) Measure the resistance and voltage of the connector.





If the result is not as specified, there may be a malfunction on the wire harness side.
* 1 : 3MZ-FE Coupe, 2AZ-FE
* 2 : 3MZ-FE Convertible
(e) Inspect using an oscilloscope.





(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)





2. CHECK TRANSPONDER KEY ECU ASSEMBLY





(a) Disconnect the T5 ECU connector.
(b) Measure the voltage and resistance of the wire harness side connector.





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the T5 ECU connector.
(d) Measure the voltage of the connector.





If the result is not as specified, there may be a malfunction on the ECU.
(e) Inspect using an oscilloscope.





(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)









(3) Waveform 3 (Reference)









(4) Waveform 4 (Reference)





3. CHECK ECM (3MZ-FE)





(a) Disconnect the E5 and E6 ECM connectors.
(b) Measure the voltage and resistance of the wire harness side connectors.





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Inspect using an oscilloscope.





(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)





4. CHECK ECM (2AZ-FE)





(a) Disconnect the E5 and E8 ECM connectors.
(b) Measure the voltage and resistance of the wire harness side connectors.





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Inspect using an oscilloscope.





(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)