Circuit description
WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Vehicles equipped with 2 wheel drive only still use EBCM 4 wheel drive input terminal.
When ignition is turned ON, battery voltage is applied to EBCM terminal "E136-5" to indicate vehicle is in 2 wheel drive.