Ford 2003 Mustang Workshop Manual page 692

I1 CHECK THE ABS WARNING INDICATOR CIRCUITRY
Key in OFF position.
Disconnect: Anti-Lock Brake Control Module C141.
Key in ON position.
Depress and release the shorting bar connector
internal to the anti-lock brake control module C141,
harness side, while checking the yellow ABS warning
indicator in the instrument cluster.
Does the yellow ABS indicator illuminate with the
shorting bar released and OFF with the shorting
bar depressed?
PINPOINT TEST J: SPONGY BRAKE PEDAL WITH NO WARNING
INDICATOR
Test Step
J1 CHECK THE VEHICLE COMPONENTS
Check the brake pedal and power
booster/brake master cylinder for correct
attachment.
Are the components OK?
J2 BLEED THE BRAKE SYSTEM
Bleed the brake system; REFER to
206-00 .
Check for spongy brake pedal.
Is the brake pedal spongy?
PINPOINT TEST K: POOR VEHICLE TRACKING DURING ANTI-LOCK
FUNCTION
Test Step
K1 BLEED THE BRAKE SYSTEM
Bleed the brake system; REFER to
206-00 .
Check for vehicle tracking poorly.
Does the vehicle track poorly?
K2 CHECK THE LF ABS VALVE OPERATION
Lift the vehicle and rotate all the wheels to
make sure they rotate freely (the vehicle must
be in neutral).
NOTE: Trigger must be depressed twice.
Each depress runs the pump motor for two
seconds.
Test Step
Section
Section
Result / Action to Take
Yes
INSTALL a new anti-lock brake
control module; REFER to
Module . TEST the system for
normal operation.
No
REFER to Section 413-01
Result / Action to Take
Yes
GO to J2 .
No
REPAIR as necessary. TEST the system for
normal operation.
Yes
INSTALL a new HCU; REFER to
Control Unit . TEST the system for normal
operation.
No
The brake system is OK. TEST the system
for normal operation.
Result / Action to Take
Yes
GO to K2 .
No
The brake system is OK. TEST the
system for normal operation.
Yes
INSTALL a new HCU; REFER to
Hydraulic Control Unit
for normal operation.
No
.
Hydraulic
. TEST the system