Ford 2003 Mustang Workshop Manual page 98

operating correctly?
PINPOINT TEST C: ACCESSORY DRIVE BEARING HOOT
Test Step
C1 CHECK THE IDLER AND TENSIONER
PULLEY BEARINGS
Carry out the Vehicle Cold Soak
Procedure in this section.
Key in START position.
Place an EngineEAR probe directly on the
pulley center post or bolt to verify which
bearing is making the noise.
Key in OFF position.
Is either bearing making the noise?
PINPOINT TEST D: POWER STEERING MOAN
Test Step
D1 CHECK THE POWER STEERING
SYSTEM
Carry out the Vehicle Cold Soak
Procedure in this section.
Key in START position.
Turn the steering wheel while the noise
is occurring and listen for changes in
sound pitch or loudness.
Key in OFF position.
Does the sound pitch or loudness
change while turning the steering
wheel?
D2 VERIFY THE SOURCE
Key in START position.
Place an EngineEAR probe near the
power steering pump/reservoir while the
noise is occurring. While an assistant
turns the steering wheel, listen for
changes in sound pitch or loudness.
Key in OFF position.
Does the sound pitch or loudness
change while turning the steering
wheel?
PINPOINT TEST E: ENGINE DRIVEN COOLING FAN MOAN
Test Step
E1 CHECK THE ENGINE DRIVEN COOLING
FAN AFTER A COLD SOAK
No
INSTALL a new valve lifter/lash adjuster
(s). TEST the system for normal
operation.
Result / Action to Take
Yes
INSTALL a new pulley/idler. CARRY OUT the
Vehicle Cold Soak Procedure and TEST the
system for normal operation.
No
CONDUCT a diagnosis on other suspect
accessory drive components.
Result / Action to Take
Yes
GO to D2 .
No
CONDUCT a diagnosis on other suspect
accessory drive components.
Yes
VERIFY that the supply tube to the pump is
unobstructed. CHECK the fluid condition and
level. DRAIN the fluid and REFILL. CARRY
OUT the Vehicle Cold Soak Procedure and
TEST the system for normal operation. REFER
to Section 211-02 .
No
Normal system operation.
Result / Action to Take