Engine Immobiliser System

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





(a) Disconnect the H27 amplifier connector.

(b) Measure the resistance according to the value(s) in the table below.





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

(c) Reconnect the H27 amplifier connector.

(d) Measure the resistance and voltage according to the value(s) in the table below.





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

(e) Using an oscilloscope, check the waveform 1.





Waveform 1 (Reference)





(f) Using an oscilloscope, check the waveform 2.





Waveform 2 (Reference)





2. CHECK TRANSPONDER KEY ECU





(a) Disconnect the H32 ECU connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.





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

(c) Reconnect the H32 ECU connector.

(d) Measure the resistance and voltage according to the value(s) in the table below.





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

(e) Using an oscilloscope, check the waveform 1.





Waveform 1 (Reference)





(f) Using an oscilloscope, check the waveform 2.





Waveform 2 (Reference)





(g) Using an oscilloscope, check the waveform 3.





Waveform 3 (Reference)





(h) Using an oscilloscope, check the waveform 4.





Waveform 4 (Reference)