7
7.31
AWD DIAGNOSIS
Symptom: AWD Will Not Engage
1. Check the gearcase AWD coil resistance. Measure
between the Grey (C) and Brown/White (B) wires.
The resistance value should be within specification.
Front Gearcase Coil Resistance:
AWD (Pin B to Pin C): 24Ω
ADC (Pin A to Pin D: 12.49Ω
2. For in depth electrical diagnostics, refer to the AWD
section in the electrical chapter.
3. If electrical tests are within specification, remove the
front gearcase and inspect the internal components.
4. Inspect the armature plate for a consistent wear
pattern. There should be two distinct wear bands
(one band inside the other). If only one band of wear
is present or if there is wear between the two bands,
inspect the coil area as indicated in Step 5. A wear
band with an interrupted wear mark may indicate a
warped plate, which may cause intermittent
operation.
5. Check to make sure the AWD coil is seated in the U-
shaped insert that is pressed into the gearcase
cover. The top of the coil should be seated below the
U-shaped insert. If the top of the coil is above the
surface of the U-shaped insert it raises the armature
plate, thereby increasing pole gap. If the pole gap
increases, the coil will not be strong enough to
engage the AWD system. If this is found, replace
cover plate assembly.
FINAL DRIVE
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