Functional Inspection 1

All-Wheel Drive (AWD) System Functional Inspection

Functional Inspection 1
Functional Inspection - is a mechanical system inspection for both the left and right side Gerotor pumps, pistons, and clutch packs and will assist in determining if:
^ The clutch pump check valve is in the "open" position.
^ The left and right side Gerotor pumps have the ability to "pull" fluid from the sump and send pressurized fluid to the left and right side clutch pack pistons.
^ The left and right side pistons will engage the specific side clutch packs.
^ There is a mechanical connection between the rear differential ring and pinion, the propeller shaft, the transfer case, and the transmission assembly.
1. Raise the vehicle on a hoist. Lift the vehicle in a manner that will allow all four wheels to rotate during testing.
2. Start the engine.
3. Move the gear shift lever to the NEUTRAL position.
4. Rotate, by hand, a rear wheel in a forward direction. If the All-Wheel Drive (AWD) system mechanical components are functioning properly, the front wheels will rotate at the same speed.
5. Rotate, by hand, the opposite side rear wheel. If the All-Wheel Drive (AWD) system mechanical components are functioning properly, the front wheels will rotate at the same speed. Failure of the front wheels to rotate during this test may indicate a "closed" clutch pump check valve, malfunctioning Gerotor pump, piston, clutch pack, or valves internal to the unit.