300Tdi Discovery
57
STEERING
8
FAULT DIAGNOSIS
4. DIRECTIONAL STABILITY
From 1. GENERAL STEERING:
1. Is directional stability concern when vehicle is
towing?
YES - Check towing/vehicle loading parameters
in Owner’s Handbook.
NO -
go to 3.
2. Is problem resolved?
YES - end
NO -
continue.
3. Check condition of rear trailing link/chassis
bushes.
4. Is problem resolved?
YES - end
NO -
continue.
5. Check condition of front and rear shock
absorbers. If in doubt change units in pairs, side
to side.
6. Is problem resolved?
YES - end
NO -
continue.
7. Check steering damper.
See Steering Damper
8. Is problem resolved?
YES - end
NO -
continue.
9. Check wheel balance
10. Is problem resolved?
YES - end
NO -
contact local technical office.
POWER STEERING FLUID LEAKS
1. Is fluid level correct?
YES - go to 3.
NO -
Refill or drain to correct level. Bleed
system, check for leaks.
See Repair,
Power Steering System - Bleed
2. Is problem resolved?
YES - end
NO -
continue.
3. Are hoses or joints leaking? Check on full lock
with engine at 2000 rev/min.
YES - loosen and retorque joints.
NO -
go to 6.
4. Does leak remain?
YES - change PAS pipe.
NO -
end.
5. Does leak remain?
YES - suspect seal in component. Check and
replace as necessary.
NO -
end.
6. Is oil escaping from filler cap?
YES - bleed system.
See Repair, Power
Steering System - Bleed
NO -
go to 8.
7. Is oil still escaping from filler cap?
YES - go back to 1.
NO -
end.
8. Is oil leaking from PAS pump?
YES - go to 10.
NO -
continue.
9. Is oil leaking from PAS box?
YES - go to 10.
NO -
end.
10. Clean unit, add tracer dye to system. Retest
11. Is oil still leaking?
YES - establish leak point. Repair or replace
unit as necessary.
NO -
end.
