Engine Immobiliser System

ENGINE IMMOBILISER SYSTEM:

TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





(a) Disconnect the J20 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 J20 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 waveform 1.









(f) Using an oscilloscope, check waveform 2.





2. CHECK TRANSPONDER KEY ECU





(a) Disconnect the J26 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 J26 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 waveform 1.









(f) Using an oscilloscope, check waveform 2.









(g) Using an oscilloscope, check waveform 3.









(h) Using an oscilloscope, check waveform 4.