Engine Immobiliser System (w/o Smart Key System)

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM (w/o Smart Key System): TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





(a) Disconnect the E5 amplifier connector.

(b) Measure the resistance of the wire harness side connector.





(c) If the result is not as specified, there may be a malfunction in the wire harness.

(d) Reconnect the E5 amplifier connector.

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





(f) If the result is not as specified, there may be a malfunction in the amplifier.





(g) Using an oscilloscope, check waveform 1.









(h) Using an oscilloscope, check waveform 2.





2. CHECK TRANSPONDER KEY ECU





(a) Disconnect the E46 ECU connector.

(b) Measure the resistance and voltage of the wire harness side connector.





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

(d) Reconnect the E46 ECU connector.

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





(f) If the result is not as specified, there may be a malfunction in the ECU.





(g) Using an oscilloscope, check waveform 1.









(h) Using an oscilloscope, check waveform 2.









(i) Using an oscilloscope, check waveform 3.









(j) Using an oscilloscope, check waveform 4.