Other information:
Removal
When replacing the ECM, the vehicle equipped with the immobilizer must
be performed procedure as below.
[In the case of installing used ECM]
1) Perform "ECM Neutral mod ...
Description
The Alternator has eight built-in diodes, each rectifying AC current to DC current.
Therefore, DC current appears at alternator "B" terminal.
In addition, the charging voltage of this alternator is regulated by the battery
voltage detection system. ...