Engine Immobilizer System
TERMINALS OF ECUTerminals Of ECU:
1. CHECK TRANSPONDER KEY AMPLIFIER
Pinouts:
a. Disconnect the I14 transponder key amplifier connector, and check the continuity of 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.
Pinouts:
b. Reconnect the I14 transponder key amplifier connector, and check the voltage each terminal of the connector.
If the result is not as specified, the transponder key amplifier may be defective.
c. Using an oscilloscope, inspect.
NOTE: The waveform provided on this text does not include noise and chattering.
HINT: If the result is not as specified, the transponder key amplifier may malfunction.
Oscilloscope Waveform:
d. Set the oscilloscope at 5 V/DIV and 10 ms/DIV, and insert the key in the ignition key cylinder. Check the waveform 1 between the terminal I14-4 and I14-7 of the transponder key amplifier.
Oscilloscope Waveform:
e. Set the oscilloscope at 5 V/DIV and 10 ms/DIV, and insert the key in the ignition key cylinder. Check the waveform 2 between the terminal I14-3 and I14-7 of the transponder key amplifier.
Oscilloscope Waveform:
f. Set the oscilloscope at 2 V/DIV and 10 ms/DIV, and insert the key in the ignition key cylinder. Check the waveform 3 between the terminal I14-5 and I14-7 of the transponder key amplifier.
Terminals Of ECM:
2. CHECK ECM
Pinouts:
a. Check the voltage and continuity of each terminal of the wire harness side connectors.
NOTE:
- The check should be started from the backside of the ECM with the ECM connector being connected.
- Inspect the power source voltage (ignition switch ON: 10 - 14 V) and the body ground (ignition switch OFF: below 5 Ohms (each ground terminal <=> engine ground, body ground)) before the check.
If the result is not as specified, the ECM may malfunction.
b. Using an oscilloscope, inspect.
NOTE: The waveform provided on this text does not include noise and chattering.
HINT: If the result is not as specified, the ECM may malfunction.
Oscilloscope Waveform:
c. Set the oscilloscope at 5 V/DIV and 10 ms/DIV, and insert the key in the ignition key cylinder. Check the waveform 1 between the terminal E7-15 and E8-1 of the ECM.
Oscilloscope Waveform:
d. Set the oscilloscope at 5 V/DIV and 10 ms/DIV, and insert the key in the ignition key cylinder. Check the waveform 2 between the terminal E7-27 and E8-1 of the ECM.
Oscilloscope Waveform:
e. Set the oscilloscope at 2 V/DIV and 10 ms/DIV, and insert the key in the ignition key cylinder. Check the waveform 3 between the terminal E7-26 and E8-1 of the ECM.