Power Steering Column Knock Noise; Power Steering Toc-Toc Noise; Power Steering Grinding Noise; Test Condition - Ford Transit 2002 Owner's Manual

Power Steering Column Knock Noise

Test Condition

Listen for steering knock noise in the following test conditions with windows closed.
1. 1. Drive over cobbled stones at low speed 16-40 km/h (10-25 mph) with and without
steering input carefully listening for knock sounds.
2. 2. Drive over straight tar strips, road rails or 25 mm tall harshness strips at low
speed 16-40 km/h (10-25 mph) both driving straight and with moderate cornering.
Symptom
Power steering system column knock
noise – a loose sounding rattle or
vibration coming from the column.
Noticeable by hearing and touch.

Power Steering Toc-Toc Noise

Test Condition
Listen for steering toc-toc noise with the engine speed at idle and the vehicle parked,
automatic transmission in "P" (PARK) or manual transmission in neutral and the windows
closed.
1. 1. Turn the steering wheel from left to right abruptly changing direction.
2. 2. Drive the vehicle for low speed parking manoeuvres constantly changing steering
direction.
Symptom
Power steering system toc-toc noise – a metallic
noise created when changing direction of
steering wheel rotation during parking
manoeuvre or at standstill.

Power Steering Grinding Noise

Test Condition
Listen for steering grinding noise with the engine speed at idle and the vehicle parked,
automatic transmission in "P" (PARK) or manual transmission in neutral and the windows
closed.
1. 1. Slowly turn the steering wheel from lock to lock.
2. 2. Tilt and extend the steering column in various positions and slowly turn the
steering wheel from lock to lock.
flow rate (by
design).
Possible
Sources
CHECK the steering column retaining
bolts and attachments to the
steering column and secure if
necessary.
REFER to:
Steering column
Steering Column, Specifications).
or steering
Check steering column and
column shaft.
intermediate shaft for free play or
loose components.
REFER to:
Steering System - General
Information, Diagnosis and Testing).
Possible Sources
Steering gear
(design tolerance
in steering rack).
http://vnx.su
safety critical
item.
Action
Specifications (211-04
Steering System (211-00
Action
Certain amount of noise
level acceptable, not a
safety critical item.