Ford F150 Pickup. Manual — part 363

component.

z

Circuitry.

z

Rear anti-lock brake
sensor.

z

Anti-lock brake control
module.

z

DTC 10-speed
sensor low
resistance/short to
ground

z

Bulkhead connector
between engine
compartment and
instrument panel sensor
terminals shorted
together.

z

Circuitry.

z

Rear anti-lock brake
sensor.

z

Anti-lock brake control
module.

z

Go To PINPOINT TEST L:
DIAGNOSTIC TROUBLE CODE
(DTC) 10 - LOW SPEED
SENSOR RESISTANCE .

z

DTC 11-brake pedal
position (BPP)
switch always
closed

z

Stoplamps.

z

Circuitry.

z

BPP switch.

z

Anti-lock brake control
module.

z

Go To PINPOINT TEST M:
DIAGNOSTIC TROUBLE CODE
(DTC) 11 - BRAKE PEDAL
POSITION (BPP) SWITCH
ALWAYS CLOSED .

z

DTC 12-loss of
hydraulic brake fluid
during an anti-lock
stop

z

Low master cylinder fill
level.

z

Fluid leaks in vehicle
brake system.

z

Brake fluid level warning
switch.

z

Master cylinder float.

z

Diode/resistor element.

z

Ignition switch.

z

Circuitry.

z

Anti-lock brake control
module.

z

Go To PINPOINT N:
DIAGNOSTIC TROUBLE CODE
(DTC) 12 - LOSS OF
HYDRAULIC BRAKE FLUID
DURING AN ANTI-LOCK
STOP .

z

DTC 13-RABS
module failure

z

Anti-lock brake control
module.

z

INSTALL a new anti-lock brake
control module. TEST the system
for normal operation.

z

REPEAT the system pre-check.

z

DTC 16-RABS
system OK

z

No system faults detected.

z

STOP. Rear anti-lock brake system
functioning properly.

2003 Ford Pickup F150

2003 BRAKES Anti-Lock Control-Rear - F150 Pickup

z

Intermittent problem
diagnosis

z

Intermittent voltage to
antilock brake control
module.

z

Less than 11 volts feed to
anti-lock brake control
module.

z

Intermittent connections
at rear anti-lock brake
sensor, RABS valve, anti-
lock brake control
module.

z

Go To PINPOINT TEST P:
INTERMITTENT PROBLEM
DIAGNOSIS .

z

Unwarranted RABS
activity

z

Metal chips on sensor
pole piece.

z

Gap between the anti-lock
brake sensor and the anti-
lock brake sensor
indicator is too large.

z

Anti-lock brake
sensor/sensor indicator
interference.

z

Go To PINPOINT TEST H:
DIAGNOSTIC TROUBLE CODE
(DTC) 6 - ERRATIC REAR
ANTI-LOCK BRAKE SENSOR
CIRCUIT .

z

Intermittent open rear
anti-lock brake sensor
circuit at intermediate
connections especially
bulkhead.

z

Go To PINPOINT TEST P:
INTERMITTENT PROBLEM
DIAGNOSIS .

z

Wire insulation.

z

INSPECT wiring harness from rear
axle assembly to frame side rail for
chafing or rub marks.

z

Rear brake adjustment.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

Brake linings.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

One or both wheels
lock up

z

Brake related concern:

{

Rear brake shoe
linings.

{

Rear wheel
cylinder.

{

Rear brake
adjustment.

{

Contaminated brake

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

2003 Ford Pickup F150

2003 BRAKES Anti-Lock Control-Rear - F150 Pickup

fluid.

z

Parking brake.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

Rear axle seal.

z

REFER to REAR DRIVE
AXLE/DIFFERENTIAL-FORD
8.8-INCH - or REAR DRIVE
AXLE/DIFFERENTIAL-FORD
9.75-INCH - .

z

Hubs engaged although
shift lever is in 4x2
position.

z

REFER to MANUAL
TRANSMISSION, CLUTCH &
TRANSFER CASE - GENERAL
INFORMATION - F150
PICKUP .

z

Faulty 4WD indicator
switch or short to 12v in
4x4 circuit 210 (LB).

z

Go To PINPOINT TEST G:
DIAGNOSTIC TROUBLE CODE
(DTC) 5 - EXCESSIVE DUMP
SOLENOID ACTIVITY .

z

Low/soft brake
pedal

z

Hydraulic leak.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

Air in brake system.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

Brake related concern:

{

Vacuum.

{

Rear wheel cylinder
or front disc brake
caliper.

{

Rear brake
tube/hose.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

Excessive dump solenoid
activity

z

Go To PINPOINT TEST G:
DIAGNOSTIC TROUBLE CODE
(DTC) 5 - EXCESSIVE DUMP
SOLENOID ACTIVITY .

z

Lack of deceleration
during medium/hard
brake applications

z

RABS valve.

z

Go To PINPOINT TEST F:
DIAGNOSTIC TROUBLE CODE
(DTC) 4 - GROUNDED/OPEN
RABS VALVE RESET SWITCH
CIRCUIT .

z

Short/open in frame or
instrument panel harness

z

Go To PINPOINT TEST H:
DIAGNOSTIC TROUBLE CODE

2003 Ford Pickup F150

2003 BRAKES Anti-Lock Control-Rear - F150 Pickup

(circuits 519 [LG/BK]
and/or 523 [RD/BK]).

{

At anti-lock brake
control module
connector (pins 3
and 10).

{

At rear anti-lock
brake sensor
connector.

{

At bulkhead or
other
interconnection.

{

Wire or insulation
due to improper
routing.

{

Test connector (in
engine
compartment).

(DTC) 6 - ERRATIC REAR
ANTI-LOCK BRAKE SENSOR
CIRCUIT .

z

Rear anti-lock brake
sensor.

z

Go To PINPOINT TEST H:
DIAGNOSTIC TROUBLE CODE
(DTC) 6 - ERRATIC REAR
ANTI-LOCK BRAKE SENSOR
CIRCUIT .

z

Rear anti-lock brake
sensor ring radial runout,
rear antilock brake sensor
indicator teeth damaged
or missing.

z

Go To PINPOINT TEST H:
DIAGNOSTIC TROUBLE CODE
(DTC) 6 - ERRATIC REAR
ANTI-LOCK BRAKE SENSOR
CIRCUIT .

z

Hydraulic leak.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

Air in brake system.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

z

Brake related concern:

{

Vacuum.

{

Wheel cylinder or
caliper.

{

Rear brake
tube/hose.

{

Brake shoe and
linings.

z

REFER to DISC - BLACKWOOD,
F150 HERITAGE PICKUP &
F150 .

2003 Ford Pickup F150

2003 BRAKES Anti-Lock Control-Rear - F150 Pickup