Ford 2003 Mustang Workshop Manual page 659

Have an assistant monitor the anti-lock brake
control module PIDs LF_WSPD, RF_WSPD,
LR_WSPD, and RR_WSPD while driving at
various speeds.
NOTE: The vehicle must be driven 16 km/h (10
miles) during this test step.
Test drive the vehicle for 16 kmh (10 miles).
Are the anti-lock brake control module PIDs
approximately the same at all times?
PINPOINT TEST I: ABS VALVE POWER RELAY CIRCUIT FAILURE
I1 CHECK CIRCUIT 534 (YE/LG) FOR AN OPEN
Key in OFF position.
Disconnect: Anti-Lock Brake Control Module C135.
Measure the voltage between anti-lock brake control
module C135 Pin 13, Circuit 534 (YE/LG), harness side
and ground.
Is the voltage greater than 10 volts?
I2 CHECK CIRCUIT 532 (OG/YE) FOR AN OPEN
Key in OFF position.
Key in ON position.
Measure the voltage between anti-lock brake control
module C135 Pin 14, Circuit 532 (OG/YE), harness side
and ground.
Is the voltage less than 5 volts?
I3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between anti-lock brake control
module C135 Pin 12, Circuit 1205 (BK), harness side and
ground.
Test Step
No
INSTALL a new anti-lock brake
sensor; REFER to Sensor—Front
Sensor—Rear . CLEAR the DTCs.
REPEAT the self-test.
Result / Action to Take
Yes
GO to I2 .
No
REPAIR the circuit. CLEAR
the DTCs. REPEAT the self-
test.
Yes
REPAIR the open in Circuit
532 (OG/YE). CLEAR the
DTCs. REPEAT the self-test.
No
GO to I3 .
Yes
INSTALL a new anti-lock
brake control module.
REFER to Module
section. CLEAR the DTCs.
REPEAT the self-test.
or
in this