Engine Immobilizer System

ENGINE IMMOBILIZER SYSTEM:

TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





(a) Disconnect the T8 amplifier connector and measure the resistance between the terminal of the wire harness side connector and body ground.





If the result is not as specified, there may be a malfunction on the wire harness side.
(b) Reconnect the T8 amplifier connector and measure the resistance and voltage of each terminal of the connector.





If the result is not as specified, the amplifier may have a malfunction.
(c) Inspect using an oscilloscope.





(1) Waveform 1 (Reference):










(2) Waveform 2 (Reference):






2. CHECK TRANSPONDER KEY ECU ASSEMBLY





(a) Disconnect the T9 ECU connector and measure the resistance and voltage between each terminal of the wire harness side connector.





If the result is not as specified, there may be a malfunction on the wire harness side.
(b) Reconnect the T9 ECU connector and measure the voltage of each terminal of the connector.





If the result is not as specified, the ECU may have a malfunction.
(c) Inspect using an oscilloscope.





(1) Wave form 1 (Reference):










(2) Wave form 2 (Reference):










(3) Wave form 3 (Reference):










(4) Wave form 4 (Reference):






3. CHECK HYBRID VEHICLE CONTROL ECU





(a) Disconnect the H31 hybrid vehicle control ECU connector and measure the resistance between the terminal of the wire harness side connector and body ground.





If the result is not as specified, there may be a malfunction on the wire harness side.
(b) Reconnect the H31 hybrid vehicle control ECU. Measure the voltage between each terminal of the connector 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) Inspect using an oscilloscope.





(1) Waveform 1 (Reference):










(2) Waveform 2 (Reference):