Ford 2003 Mustang Workshop Manual page 523

Check accessory drive belt tension and
condition. Refer to
Is the accessory drive belt OK?
E3 CHECK POWER STEERING HOSES
Check power steering pressure hoses, power
steering gear pressure hoses and power
steering return hose for cracks or leaks.
Do power steering pressure hose, power
steering gear hose and power steering
return hose check OK?
E4 CHECK BRAKE PEDAL LINKAGE
Check brake pedal linkage for binding or
sticking operation.
Does pedal linkage check OK?
E5 CHECK POWER STEERING PUMP SPEED
Check engine idle speed against
specifications.
Is engine idle speed OK?
E6 CHECK FOR PLUGGED RETURN HOSE
NOTE: The return hose from the oil cooler to
the power steering reservoir has an in-line
filter in the hose.
Disconnect power steering return hose from
power steering fluid cooler and power
steering pump reservoir.
Pass air through hose from the oil cooler end.
Is hose plugged?
E7 CHECK POWER STEERING PUMP FLOW
AND RELIEF
Test power steering pump for correct flow
and relief pressure. Refer to
Is power steering pump operating
correctly?
PINPOINT TEST F: HYDRO-BOOST ERRATIC OPERATION, STICKS,
BINDS OR GRABS
F1 CHECK SUPPLY HOSE
Check for obstructions in power steering return hose and
Section 303-05 .
Section 211-00
Test Step
Yes
GO to E3 .
No
INSTALL a new accessory drive belt.
REFER to Section 303-05
Yes
GO to E4 .
No
INSTALL new hoses as necessary.
REFER to Section 211-00
Yes
GO to E5 .
No
INSTALL new pedal linkage as necessary.
REFER to Section 206-06
Yes
GO to E6 .
No
SET engine idle speed to specification.
REFER to Powertrain Control/Emissions
Diagnosis (PC/ED) manual.
Yes
INSTALL a new power steering return
hose.
No
GO to E7 .
Yes
INSTALL a new power brake hydro-boost
.
unit. REFER to Section 206-07
No
INSTALL a new power steering pump.
REFER to Section 211-02
.
.
.
.
.
Result / Action to
Take
Yes