Precautions on 4WD Control System Circuit Inspection
- For system circuit, refer to «4WD CONTROL SYSTEM DESCRIPTION»(ref-181394-S24702254952005080100000) .
- For terminal arrangement, refer to «4WD CONTROL CIRCUIT VOLTAGE CHECK»(ref-181394-S39083345642005080100000) .
The differential assembly using a hypoid bevel pinion and gear is installed to the front axle. 4WD control system controls drive force to be transmitted to front axles or not. The reduction ratio is different respectively among several kinds of engineers or transmissions.
The differential assembly is decisive in that the drive power is concentrated there. Therefore, use of genuine parts and specified torque is compulsory. Further, because of sliding tooth meshing with high pressure between bevel pinion and gear, it is mandatory to lubricate them by hypoid gear oil.
4WD Control System Inspection
- Install special tool to air hose connecting between air pump assembly and differential (actuator) as shown in the figure. Tighten adjusting screw (2) of special tool as far as it stops. Close air check side opening by using fuel hose (1) as blind plug. NOTE: Use care not to bend any part of hose. Special tool (A): 09918-18110 (B): (SUZUKI genuine part)
- Turn ON ignition switch and shift transfer lever from "2H" to "4H" range.
- Check that motor starts running (a sound can be heard) within 1 second and it stops when gauge of special tool indicates specified pressure value. Check also for air leakage. Air pressure specification (for 4WD control system inspection): 30.0 - 45.0 kPa (0.30 - 0.45 kg/cm 2 , 4.25 - 6.40 psi)
- Check that pressure value indicated on gauge of special tool drops as soon as transfer lever is shifted to "2H" position.
- Start motor by shifting transfer lever to "4H" position again. Loosen adjusting screw (2) to lower pressure value on gauge. Motor should start to run again and stop in about 4 seconds.
- With the adjusting screw (2) of special tool loosened, shift transfer shift lever to "N" or "2H" position and then "4L" or "4H" position. Pump motor should stop about 10 seconds after motor starts to run.
