Ford 2003 Mustang Workshop Manual page 662

two seconds.
Trigger the anti-lock brake control module
active command PMP MOTOR ON for four
seconds.
Apply moderate brake pedal effort.
Have an assistant attempt to rotate the LR
and RR wheels while the pump motor is
running.
Does the LR or RR wheel rotate?
L7 CHECK THE REAR ABS VALVE RELEASE
Apply moderate brake pedal effort.
Trigger the anti-lock brake control module
active command R INLET and R OUTLET.
NOTE: The scan tool will energize the valves
for only two seconds per trigger press.
Have an assistant rotate the LR and RR
wheels immediately after depressing trigger.
Does the LR or RR wheel rotate?
L8 CHECK FOR DTCS
Carry out the anti-lock brake control module
self-test.
Are any DTCs retrieved?
Hydraulic Control Unit
for normal operation.
No
GO to L7 .
Yes
The ABS system is operating correctly.
No
GO to L8 .
Yes
GO to the Anti-Lock Brake Control Module
Diagnostic Trouble Code (DTC) Index.
No
INSTALL a new HCU; REFER to
Hydraulic Control Unit
for normal operation.
. TEST the system
. TEST the system