300Tdi Defender
STEERING
9
FAULT DIAGNOSIS
POWER STEERING SYSTEM - EXCESSIVE NOISE
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. Is pressure hose from pump to box touching
body in a hard foul condition?
YES - route hose away from body.
NO - go to 5.
4. Does noise remain?
YES - continue.
NO - end.
5. Is noise a whistle or hiss on full lock?
YES - noise is not a fault unless excessive.
Compare with other vehicles
NO - go to 8.
6. Is noise excessive?
YES - continue.
NO - end.
7. Change steering box and/or pump.
8. Is noise a squeal on full lock?
YES - checkdrive belt tension and remove belt if
necessary
See ELECTRICAL, Repair,
Auxiliary drive Belt .
NO - go to 10.
9. Does squeal remain?
YES - drive belt contaminated, change belt.
NO - end.
10. Is noise a continuous moan?
YES - bleed PAS system
See Repair, Power
Steering System - Bleed .
NO - go to 13.
11. Does moan remain?
YES - do figure 8 manoeuvres.
NO - end.
12. Does moan remain?
YES - continue
NO - end.
13. Is noise an intermittent "grunt"?
YES -
See Power Steering System - Grunt .
NO - continue.
14. Is it a clunking noise?
YES - check drive belt tension and renew belt if
necessary
See ELECTRICAL, Repair,
Auxiliary drive Belt .
NO - contact local technical office.
15. Does noise remain?
YES - Suspect suspension or drive train.
NO - end.
POWER STEERING SYSTEM - GRUNT
Steering box grunts intermittently when turning
from lock to lock:
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. Does grunt remain?
YES - continue
NO - end.
3. Is correct low pressure hose ANR 3152, steering
box to reservoir fitted?
YES - go to 5.
NO - Fit correct hose.
4. Does grunt remain?
YES - continue
NO - end.
5. Purge box by doing figure 8 manoeuvres e.g. on
car park, followed by 10 minutes normal road
use.
6. Does grunt remain?
YES - Contact local technical office
NO - end.