lock FORD MUSTANG 2003 Workshop Manual

z
Is the resistance greater than 10,000 ohms? F3 CHECK THE SUSPECT ANTI-
LOCK BRAKE
SENSOR FOR A SHORT TO GROUND z
Disconnect: Suspect Anti- Lock Brake Sensor.
z Measure the resistance between suspect anti- lock
brake sensor Pin 1 (component side) and ground.
z Is the resistance greater than 10,000 ohms? Yes
If RF, REPAIR Circuit 514 (YE/RD)
and Circuit 516 (YE/BK), as
necessary. CLEAR the DTCs.
REPEAT the self-
test. If LF, REPAIR
Circuit 521 (TN/OG) and Circuit 522
(TN/BK), as necessary. CLEAR the
DTCs. REPEAT the self- test. If RR,
REPAIR Circuit 494 (TN/LG) and
Circuit 492 (BN), as necessary.
CLEAR the DTCs. REPEAT the self-
test. If LR, REPAIR Circuit 496 (OG)
and Circuit 499 (GY/BK), as
necessary. CLEAR the DTCs.
REPEAT the self- test.
No
INSTALL a new anti- lock brake
sensor; REFER to Sensor — Front or
Sensor — Rear . CLEAR the DTCs.
REPEAT the self- test. F4 CHECK THE SUSPECT ANTI-
LOCK BRAKE
SENSOR CIRCUIT FOR FOR AN OPEN z
Key in OFF position.
z Measure the resistance between anti- lock brake
control module C141 Pins, harness side and
suspect anti- lock brake sensor, harness side as
follows: DTC Anti-Lock
Brake Control Module Anti-Lock
Brake
Sensor Circuit
C1145
(RF) C141 Pin 4 C145 Pin 1 514
(YE/RD) C1145
(RF) C141 Pin 5 C145 Pin 2 516
(YE/BK) C1155
(LF) C141 Pin 20 C144 Pin 1 521
(TN/OG) C1155
(LF) C141 Pin 21 C144 Pin 2 522
(TN/BK) C1165
(RR) C141 Pin 1 C319 Pin 2 494
(TN/LG) C1165 C141 Pin 3 C319 Pin 1 492 (BN) Yes
GO to
F5 .
No
REPAIR the circuit in question.
CLEAR the DTCs. REPEAT the self-
test. Klj . 12 ba
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PINPOINT TEST G: DTC C1222, ANTI-
LOCK BRAKE SENSOR
MISMATCH z
Are the resistances less than 5 ohms? (RR)
C1175
(LR) C141 Pin 22 C320 Pin 2 496 (OG)
C1175
(LR) C141 Pin 23 C320 Pin 1 499
(GY/BK) F5 CHECK THE ANTI-
LOCK BRAKE SENSOR z
Measure the resistance between suspect anti- lock
brake sensor pin 1 (component side) and suspect
anti- lock brake sensor pin 2 (component side).
z Is the resistance between 1280 and 1920 (front)
or 1830 and 2760 (rear) ohms? Yes
INSTALL a new anti-
lock brake
control module; REFER to Module .
REPEAT the self- test.
No
INSTALL a new anti- lock brake
sensor; REFER to Sensor — Front or
Sensor — Rear . CLEAR the DTCs.
REPEAT the self- test. Test Step Result / Action to Take
G1 CHECK THE VEHICLE
COMPONENTS z
Check for correct wheel and tire
size, front- to-rear and side- to-
side.
z Check for excessive bearing end
play.
z Check the anti- lock brake sensor
indicator for a bent sensor ring or
missing teeth.
z Are the conditions OK? Yes
GO to
G2 .
No
REPAIR as necessary. CLEAR the DTCs. REPEAT
the self- test. G2 TEST DRIVE THE VEHICLE
z
Enter the following diagnostic Yes Klj . 13 ba
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PINPOINT TEST H: DTC C1233 (LF), C1234 (RF), C1235 (RR), C1236
(LR), ANTI-
LOCK BRAKE SENSOR INPUT SIGNAL MISSING
PINPOINT TEST I: THE YELLOW ABS WARNING INDICATOR DOES
NOT SELF- CHECK mode on the diagnostic tool:
CLEAR the DTCs.
z Key in OFF position.
z Key in ON position.
z Test drive the vehicle over 24
km/h (15 mph).
z Enter the following diagnostic
mode on the diagnostic tool:
Retrieve DTCs.
z Is DTC C1222 retrieved? INSTALL a new anti-
lock brake control module;
REFER to Module . REPEAT the self-
test.
No
If another DTC is retrieved, GO to the Anti- Lock Brake
Control Module Diagnostic Trouble Code (DTC) index.
If no DTCs are retrieved, system is OK. Test Step Result / Action to Take
H1 CHECK THE SUSPECT ANTI-
LOCK BRAKE
SENSOR z
Check the suspect anti- lock brake sensor
mounting.
z Check the suspect anti- lock brake sensor for
excessive dirt build up, obstructions, and
damage.
z Is the suspect anti- lock brake sensor and
mounting OK? Yes
GO to
H2 .
No
REPAIR as necessary. CLEAR the
DTCs. REPEAT the self- test. H2 CHECK THE SUSPECT ANTI-
LOCK BRAKE
SENSOR INDICATOR z
Check the suspect anti- lock brake sensor
indicator for corrosion, nicks, bridged teeth,
damaged teeth, correct mounting, and
alignment with the anti- lock brake sensor.
z Check the air gap and bearing end play.
z Is the suspect anti- lock brake sensor
indicator OK? Yes
GO to
H3 .
No
INSTALL a new anti- lock brake sensor
indicator; REFER to Sensor Indicator —
Front or
Sensor Indicator — Rear .
CLEAR the DTCs. REPEAT the self- test. H3 CHECK THE ANTI-
LOCK BRAKE SENSOR
OUTPUT z
Key in ON position.
z Enter the following diagnostic mode on the
diagnostic tool: CLEAR the DTCs.
z Key in OFF position.
z Key in ON position.
z 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.
z NOTE: the vehicle must be driven 16 km (10
miles) during this test step.
z Test drive the vehicle for 16 km (10 miles).
z Are the anti- lock brake control module PIDs
approximately the same at all times? Yes
INSTALL a new anti-
lock brake control
module; REFER to Module . REPEAT
the self- test.
No
INSTALL a new anti- lock brake sensor;
REFER to Sensor — Front or
Sensor —
Rear . CLEAR the DTCs. REPEAT the
self- test. Klj . 14 ba
202003 Mustang Workshop Manual
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PINPOINT TEST J: SPONGY BRAKE PEDAL WITH NO WARNING
INDICATOR
PINPOINT TEST K: POOR VEHICLE TRACKING DURING ANTI-
LOCK
FUNCTION Test Step Result / Action to Take
I1 CHECK THE ABS WARNING INDICATOR CIRCUITRY
z
Key in OFF position.
z Disconnect: Anti- Lock Brake Control Module C141.
z Key in ON position.
z 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.
z Does the yellow ABS indicator illuminate with the
shorting bar released and OFF with the shorting
bar depressed? Yes
INSTALL a new anti-
lock brake
control module; REFER to
Module . TEST the system for
normal operation.
No
REFER to Section 413 - 01 .
Test Step Result / Action to Take
J1 CHECK THE VEHICLE COMPONENTS
z
Check the brake pedal and power
booster/brake master cylinder for correct
attachment.
z Are the components OK? Yes
GO to
J2 .
No
REPAIR as necessary. TEST the system for
normal operation. J2 BLEED THE BRAKE SYSTEM
z
Bleed the brake system; REFER to Section 206 - 00 .
z Check for spongy brake pedal.
z Is the brake pedal spongy? Yes
INSTALL a new HCU; REFER to
Hydraulic Control Unit . TEST the system for normal
operation.
No
The brake system is OK. TEST the system
for normal operation. Test Step Result / Action to Take
K1 BLEED THE BRAKE SYSTEM
z
Bleed the brake system; REFER to Section 206 - 00 .
z Check for vehicle tracking poorly.
z Does the vehicle track poorly? Yes
GO to
K2 .
No
The brake system is OK. TEST the
system for normal operation. K2 CHECK THE LF ABS VALVE OPERATION
z
Lift the vehicle and rotate all the wheels to
make sure they rotate freely (the vehicle must
be in neutral).
z NOTE: Trigger must be depressed twice.
Each depress runs the pump motor for two
seconds. Yes
INSTALL a new HCU; REFER to
Hydraulic Control Unit
. TEST the system
for normal operation.
No Klj . 15 ba
202003 Mustang Workshop Manual
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z
Trigger the anti- lock brake control module
active command PMP MOTOR ON for four
seconds.
z Apply moderate brake pedal effort.
z Have an assistant attempt to rotate the LF
wheel while the pump motor is running.
z Does the LF wheel rotate? GO to
K3 .
K3 CHECK THE LF ABS VALVE RELEASE
z
Apply moderate brake pedal effort.
z Trigger the anti- lock brake control module
active command LF INLET and LF OUTLET.
z NOTE: Trigger must be depressed twice.
Each depress runs the pump motor for two
seconds.
z Have an assistant rotate the LF wheel
immediately after depressing trigger.
z Does the LF wheel rotate? Yes
GO to
K4 .
No
GO to K10 .
K4 CHECK THE RF ABS VALVE OPERATION
z
NOTE: Trigger must be depressed twice.
Each depress runs the pump motor for two
seconds.
z Trigger the anti- lock brake control module
active command PMP MOTOR ON for four
seconds.
z Apply moderate brake pedal effort.
z Have an assistant attempt to rotate the RF
wheel while the pump motor is running.
z Does the RF wheel rotate? Yes
INSTALL a new HCU; REFER to
Hydraulic Control Unit
. TEST the system
for normal operation.
No
GO to K5 .
K5 CHECK THE RF ABS VALVE RELEASE
z
Apply moderate brake pedal effort.
z Trigger the anti- lock brake control module
active command RF INLET and RF OUTLET.
z NOTE: The scan tool will energize the valves
for only two seconds per trigger press.
z Have an assistant rotate the RF wheel
immediately after depressing trigger.
z Does the RF wheel rotate? Yes
GO to
K6 .
No
GO to K10 .
K6 CHECK THE LR ABS VALVE OPERATION
z
NOTE: Trigger must be depressed twice.
Each depress runs the pump motor for two
seconds.
z Trigger the anti- lock brake control module
active command PMP MOTOR ON for four
seconds.
z Apply moderate brake pedal effort.
z Have an assistant attempt to rotate the LR
wheel while the pump motor is running.
z Does the LR wheel rotate? Yes
INSTALL a new HCU; REFER to
Hydraulic Control Unit
. TEST the system
for normal operation.
No
GO to K7 .
K7 CHECK THE LR ABS VALVE RELEASE
z
Apply moderate brake pedal effort.
z Trigger the anti- lock brake control module
active command LR INLET and LR OUTLET.
z NOTE: The scan tool will energize the valves
for only two seconds per trigger press.
z Have an assistant rotate the LR wheel
immediately after depressing trigger.
z Does the LR wheel rotate? Yes
GO to
K8 .
No
GO to K10 . Klj . 16 ba
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PINPOINT TEST L: THE TRACTION CONTROL IS INOPERATIVE—
DOES NOT OPERATE CORRECTLY K8 CHECK THE RR ABS VALVE OPERATION
z
NOTE: Trigger must be depressed twice.
Each depress runs the pump motor for two
seconds.
z Trigger the anti- lock brake control module
active command PMP MOTOR ON for four
seconds.
z Apply moderate brake pedal effort.
z Have an assistant attempt to rotate the RR
wheel while the pump motor is running.
z Does the RR wheel rotate? Yes
INSTALL a new HCU; REFER to
Hydraulic Control Unit
. TEST the system
for normal operation.
No
GO to K9 .
K9 CHECK THE RR ABS VALVE RELEASE
z
Apply moderate brake pedal effort.
z Trigger the anti- lock brake control module
active command RF INLET and RF OUTLET.
z NOTE: The scan tool will energize the valves
for only two seconds per trigger press.
z Have an assistant rotate the RR wheel
immediately after depressing trigger.
z Does the RR wheel rotate? Yes
The ABS system is operating correctly.
No
GO to
K10 .
K10 CHECK FOR DTCS
z
Carry out the anti- lock brake control module
self- test.
z Are any DTCs retrieved? Yes
GO to the Anti-
Lock Brake Control Module
Diagnostic Trouble Code (DTC) Index.
No
INSTALL a new HCU; REFER to
Hydraulic Control Unit . TEST the system
for normal operation. Test Step Result / Action to Take
L1 CHECK THE TRACTION CONTROL SWITCH CIRCUITRY
z
Key in OFF position.
z Disconnect: Instrument Cluster C251.
z Key in ON position.
z Measure the voltage between instrument cluster C251 Pin 9,
Circuit 959 (GY), harness side and ground, while depressing
and releasing the traction control switch.
z Is the voltage greater than 10 volts with the traction control
switch depressed and zero volts with the traction control
switch released? Yes
INSTALL a new
instrument cluster,
REFER to
Section 413 -
01 . TEST the system
for normal operation.
No
GO to L2 . Klj . 17 ba
202003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Sensor Indicator —
Rear
Removal 1. Remove the rear axle shaft bearing, refer to Section 205 - 02A or
Section 205 - 02B .
2. Using the special tool, remove the anti- lock brake sensor indicator from the axle shaft.
SECTION 206-
09B: Anti-Lock Control — Traction Control 2003 Mustang Workshop Manual Special Tool(s)
Pinion Bearing Cone Remover
205-
D002 (D79P- 4621A) Axle Bearing/Seal Plate
205-
090 (T75L-1165- B) Sensing Ring Replacer
206-
041 (T89P-20202- A) Klj . 1 ba
32003 Mustang Workshop Manual
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Installation
1. Using the special tools, align the rear anti- lock brake sensor indicator to the rear axle shaft.
2. Using the special tools, press the rear anti- lock brake sensor on the rear axle shaft to
specification. Klj . 2 ba
32003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Hydraulic Control Unit
Removal
1. Disconnect the battery ground cable(14301).
2. Disconnect the anti- lock-brake control module electrical connector.
3. NOTE: The 4 wheel anti- lock brake system (4WABS) with traction control is shown , the
4WABS without traction control system is similar with one less hydraulic line.
NOTE: Plug brake lines to prevent any brake fluid loss.
Disconnect the brake lines from the hydraulic control unit (HCU).
4. Remove the HCU bracket nuts to HCU.
5. Remove the HCU.
SECTION 206-
09B: Anti-Lock Control — Traction Control 2003 Mustang Workshop Manual Klj . 1 ba
32003 Mustang Workshop Manual
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6. Remove the pump motor electrical connector.
7. Remove the anti-
lock-brake control module screws.
8. Remove the anti- lock-brake control module from the HCU.
Installation 1. NOTE: The brake system must be bled after the HCU is installed or replaced. Refer to Section 206 - 00 .
To install, reverse the removal procedure. Klj . 2 ba
32003 Mustang Workshop Manual
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