4WD Control System Check
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.
Before performing the trouble diagnosis, check that the transfer and front differential are in good condition and there is no air leakage from air hoses and the actuator. Refer to "CHECK AIR PRESSURE CHECK: FRONT " and "AIR PUMP ASSEMBLY INSPECTION: FRONT ".