Ford F150 Pickup. Manual — part 1353
INTAKE AIR TEMPERATURE SENSOR
See TEST DA: TEMPERATURE SENSOR TEST (IAT, ECT & EOT) under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for Intake Air Temperature (IAT) sensor testing
procedures and specifications.
INTAKE AIR TEMPERATURE 2 SENSOR (SC ONLY)
See TEST DU: INTAKE AIR TEMPERATURE 2 under SYSTEM TESTS in SELF-DIAGNOSTICS -
CNG, FLEX-FUEL & GASOLINE article for Intake Air Temperature 2 (IAT2) sensor testing procedures and
specifications.
KNOCK SENSOR
See TEST DG: KNOCK SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL &
GASOLINE article for Knock Sensor (KS) testing procedures and specifications.
MASS AIRFLOW SENSOR
See TEST DC: MASS AIRFLOW SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG,
FLEX-FUEL & GASOLINE article for Mass Airflow (MAF) sensor testing procedures and specifications.
OUTPUT SHAFT SPEED SENSOR
See TEST TJ: OUTPUT SHAFT SPEED SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS -
CNG, FLEX-FUEL & GASOLINE article for Output Shaft Speed (OSS) sensor testing procedures and
specifications.
PARK/NEUTRAL POSITION OR CLUTCH PEDAL POSITION SWITCH
See TEST TA: PARK/NEUTRAL POSITION OR CLUTCH PEDAL POSITION SWITCHES under
SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for testing procedures
and specifications.
RV Cutaway
On Lower Right Of Steering Column
Sable & Taurus
In Right Side Of Luggage
Compartment. Behind Side Panel
Thunderbird
In Left Side Front Footwell
Windstar
On Right Rear Side Of Vehicle
ZX2
Bottom Of Left "A" Pillar
NOTE:
On some models, IAT sensor is part of Mass Airflow (MAF) sensor assembly. If
all 6 terminals of MAF sensor connector are being used, IAT sensor is integral
to MAF sensor. See WIRING DIAGRAMS .
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE System & Component Testing - Gasoline
POWER STEERING PRESSURE SENSOR
See TEST DT: POWER STEERING PRESSURE SENSOR under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for Power Steering Pressure (PSP) sensor testing
procedures and specifications.
POWER STEERING PRESSURE SWITCH
See TEST FF: POWER STEERING PRESSURE SWITCH under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for testing procedures and specifications.
REVERSE SWITCH
See TEST TH: REVERSE SWITCH under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL
& GASOLINE article for testing procedures and specifications.
THERMAL MANIFOLD ABSOLUTE PRESSURE SENSOR
See TEST DM: MANIFOLD ABSOLUTE PRESSURE SENSOR & THERMAL MANIFOLD
ABSOLUTE PRESSURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL
& GASOLINE article for Thermal Manifold Absolute Pressure (TMAP) sensor testing procedures and
specifications.
THROTTLE POSITION SENSOR
For electronic throttle control system, see TEST DV: ELECTRONIC THROTTLE CONTROL
THROTTLE POSITION SENSOR, THROTTLE CONTROL MOTOR under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for Throttle Position (TP) sensor testing
procedures and specifications.
For all others, see TEST DH: THROTTLE POSITION SENSOR under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for Throttle Position (TP) sensor testing
procedures and specifications.
TRANSFER CASE SPEED SENSOR
See TEST DP: VEHICLE SPEED SENSOR/TRANSFER CASE SPEED SENSOR under SYSTEM TESTS
in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for Transfer Case Speed Sensor (TCSS)
testing procedures and specifications.
TRANSMISSION CONTROL SWITCH
See TEST TB: TRANSMISSION CONTROL SWITCH/TRANSMISSION CONTROL INDICATOR
LAMP under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for
testing procedures and specifications.
VEHICLE SPEED SENSOR
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE System & Component Testing - Gasoline
See TEST DP: VEHICLE SPEED SENSOR/TRANSFER CASE SPEED SENSOR under SYSTEM TESTS
in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for Vehicle Speed Sensor (VSS) testing
procedures and specifications.
RELAYS & SOLENOIDS
AIR INJECTION BY-PASS SOLENOID
See TEST HM: SECONDARY AIR INJECTION SYSTEM under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.
AIR INJECTION DIVERTER SOLENOID
See TEST HM: SECONDARY AIR INJECTION SYSTEM under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.
CANISTER VENT SOLENOID
See FUEL EVAPORATION under EMISSION SYSTEMS & SUB-SYSTEMS.
COOLING FAN CONTROL, FUEL PUMP & PCM POWER RELAY
Turn ignition switch to OFF position. On ISO micro fuel pump relay terminals that are numbered 1-5, measure
resistance between relay terminal No. 1 and all other relay terminals. Resistance should be 40-120 ohms
between terminals No. 1 and 2 and more than 10 k/ohms between terminal No. 1 and all other relay terminals.
On ISO mini fuel pump relay terminals that are numbered 30, 85, 86, 87 and 87A, measure resistance between
relay terminal No. 85 and all other relay terminals. Resistance should be 40-120 ohms between terminals No. 85
and 86 and more than 10 k/ohms between terminal No. 85 and other relay terminals. On both relays, if
resistance is not as specified replace relay. If resistance is as specified, relay is okay. Check associated circuits
for possible open or shorts.
NOTE:
On Mustang and ZX2, a Constant Control Relay Module (CCRM) is used. See
TEST X: CONSTANT CONTROL RELAY MODULE under SYSTEM TESTS in
SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for Constant
Control Relay Module (CCRM) testing procedures.
NOTE:
Two different types of relay can be used. An ISO micro relay (relay terminals are
numbered 1-5), or an ISO mini relay (terminals are numbered 30, 85, 86, 87 and
87A). On ISO micro relays, relay coil terminals are No. 1 and 2. On ISO mini
relays, relay coil terminals are No. 85 and 86. See Fig. 5 or Fig. 6 .
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE System & Component Testing - Gasoline
Fig. 5: Identifying ISO Mini Relay Terminals
Courtesy of FORD MOTOR CO.
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE System & Component Testing - Gasoline
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