"4L" switch
WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
Measure resistance between "d" and "c" terminals of 2WD/4WD switch.
If measured resistance is out of specification below, replace 2WD/4WD switch.
"4L" switch resistance
"4L" switch released: 950 - 1050 Ω
"4L" switch kept pushing: 0 - 1 Ω