Engine Immobilizer System

ENGINE IMMOBILIZER: ENGINE IMMOBILIZER SYSTEM: TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





(a) Disconnect the T12 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.

(c) Reconnect the T12 amplifier connector.

(d) Measure the resistance and voltage of the connector.





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

(e) Using an oscilloscope, check waveform 1.









(f) Using an oscilloscope, check waveform 2.









(g) Using an oscilloscope, check waveform 3.









2. CHECK TRANSPONDER KEY ECU





(a) Disconnect the T13 ECU connector.

(b) Measure the resistance and voltage 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 T13 ECU connector.

(d) Measure the voltage of the connector.





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

(e) Using an oscilloscope, check waveform 1.









(f) Using an oscilloscope, check waveform 2.









(g) Using an oscilloscope, check waveform 3.









(h) Using an oscilloscope, check waveform 4.









(i) Using an oscilloscope, check waveform 5.









3. CHECK ECM





(a) Measure the resistance and voltage of the connectors.





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

(b) Using an oscilloscope, check waveform 1.









(c) Using an oscilloscope, check waveform 2.