Engine Immobilizer System (w/o Smart Key System)

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/o Smart Key System): TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





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

Inspection with Ignition Switch Off





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

Inspection of Waveforms of Communication Signals between Transponder Key Amplifier and Transponder Key ECU Assembly





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

(b) Inspect using an oscilloscope.

NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.





(1) Waveform 1 (Reference)

Measurement Condition





(2) Waveform 2 (Reference)





Measurement Condition





2. CHECK TRANSPONDER KEY ECU ASSEMBLY





(a) Disconnect the C39 transponder key ECU assembly 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 C39 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) Inspect using an oscilloscope.

NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.





(1) Waveform 1 (Reference)

Measurement Condition





(2) Waveform 2 (Reference)





Measurement Condition





(3) Waveform 3 (Reference)





Measurement Condition





(4) Waveform 4 (Reference)





Measurement Condition